A295014 -id:A295014 - cp's OEIS frontend

A295004 The number of seconds after midnight (3600H + 60MM + SS) corresponding to prime time numbers A295014, i.e., numbers of the form HMMSS with primes H < 24 and MM, SS < 60.

7322, 7323, 7325, 7327, 7331, 7333, 7337, 7339, 7343, 7349, 7351, 7357, 7361, 7363, 7367, 7373, 7379, 7382, 7383, 7385, 7387, 7391, 7393, 7397, 7399, 7403, 7409, 7411, 7417, 7421, 7423, 7427, 7433, 7439, 7502, 7503, 7505, 7507, 7511, 7513, 7517, 7519, 7523

Offset: 1

M. F. Hasler, Jan 15 2018

See A295003 for the subsequence of terms which correspond to "prime time primes" (cf. A295013), and A295002 for the primes among these.

This is to A295014 what is A295003 to A295013, or what is A118848 to A050246, or what is A118850 to A118849.

M. F. Hasler, Table of n, a(n) for n = 1..2601 (complete sequence).

Cf. A295014, A295003, A295013, A295011, A295002, A295000; A050246, A159911, A229106; A118848, A118849, A118850.

With[{s = Prime@ Range@ PrimePi@ 60}, NumberCompose[{#1, #2, #3}, {3600, 60, 1}] & @@ # & /@ Tuples@ {TakeWhile[s, # < 24 &], s, s}] (* Michael De Vlieger, Jan 21 2018 *)

apply( A292579, A295014) \\ convert prime time numbers to seconds

a(n) = A292579(A295014(n))

A295000 Prime time primes (of the form HMMSS with primes H < 24 and MM, SS < 60) such that the corresponding number of seconds after midnight is also prime.

Original entry on oeis.org

20231, 20297, 20353, 20507, 20719, 20753, 20771, 21107, 21313, 21379, 21713, 21767, 21773, 21929, 21937, 22343, 22367, 22397, 22961, 22973, 23131, 23143, 23167, 23173, 23197, 23719, 23741, 23743, 23747, 23753, 24137, 24179, 24337, 24359, 24371, 24379

Offset: 1

M. F. Hasler, Jan 15 2018

Could be called "super prime time primes": all of H, MM, SS, HMMSS (6-digit clock display) and H*3600 + MM*60 + SS (seconds after midnight) are prime.
This sequence lists the prime time primes A295013 for which the number of seconds A295003 is prime. These are also the times HMMSS (obtained through A055643) which correspond to the subset A295002 of primes in A295003.
Sequence A295002 lists the number of seconds after midnight corresponding to the "prime times" = 6-digit clock displays listed here.
Sequences A295003 and A295004 list the number of seconds after midnight corresponding to the prime time primes A295013 and prime time numbers A295014, i.e., primes and all numbers of the form HMMSS where H < 24 and MM, SS < 60 are prime.

			The smallest prime of the form HMMSS, with H, MM, SS and H*3600 + MM*60 + SS also prime, is a(1) = 20231, corresponding to a prime number A295002(1) = H*3600 + MM*60 + SS = 7351 (the first prime in A295003) of seconds after midnight.

M. F. Hasler, Table of n, a(n) for n = 1..404 (complete sequence).

Cf. A295002, A295003, A295013, A295011, A295004, A295014; A050246, A159911, A229106; A118848, A118849, A118850; A055643, A292579.

apply( A055643, A295002) /* or */ select( p->isprime(A292579(p)), A295013)

a(n) = A055643(A295002(n)) ; A295000 = { A295013(k) | A295003(k) is prime }.

A295011 Numbers of the form HMMSS with primes H < 24 and MM, SS < 60, for which the number of seconds after midnight, 3600H+60MM+SS, is also prime.

Original entry on oeis.org

20211, 20213, 20229, 20231, 20313, 20331, 20337, 20353, 20507, 20517, 20523, 20529, 20537, 20541, 20547, 20559, 20719, 20723, 20729, 20753, 21107, 21113, 21117, 21119, 21123, 21141, 21147, 21159, 21313, 21329, 21331, 21337, 21359, 21711, 21713, 21717

Offset: 1

M. F. Hasler, Jan 16 2018

Subsequence of A295014 (prime time numbers) for which the corresponding number of seconds after midnight (A295004) is also prime.

The "super prime time primes" A295000 are the primes within this sequence.

			Construct all numbers of the form concat(H,MM,SS) where H < 24 and MM, SS < 60 are primes. These start 2:02:02, 2:02:03, 2:02:03, ... (without ":"s), this is A295014. The corresponding number of seconds after midnight is A292579(HMMSS) = 3600*H + 60*MM + SS. These numbers are listed in A295004. The first prime in that sequence is 7331 = A292579(20211), i.e., the first H:MM:SS for which that number of seconds is prime is 2:02:11, whence a(1) = 20211.

M. F. Hasler, Table of n, a(n) for n = 1..770 (complete sequence).

Cf. A295014, A295004, A295000, A295002, A295013, A295003; A050246, A159911, A229106; A118848, A118849, A118850.

With[{s = Prime@ Range@ PrimePi@ 60}, FromDigits@ Flatten[PadLeft[IntegerDigits[#], 2] & /@ #] & /@ Select[Tuples@ {TakeWhile[s, # < 24 &], s, s}, PrimeQ@ NumberCompose[{#1, #2, #3}, {3600, 60, 1}] & @@ # &]] (* Michael De Vlieger, Jan 21 2018 *)

select( t->isprime(A292579(t)), A295014)

A295013 Prime time primes on 6-digit clocks, second definition: primes of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60.

Original entry on oeis.org

20219, 20231, 20261, 20297, 20323, 20341, 20347, 20353, 20359, 20389, 20507, 20543, 20707, 20717, 20719, 20731, 20743, 20747, 20753, 20759, 20771, 20773, 20789, 21107, 21143, 21179, 21313, 21317, 21319, 21323, 21341, 21347, 21379, 21383, 21397, 21713

Offset: 1

M. F. Hasler, Jan 09 2018

A subsequence and variant of A229106, where the individual digit groups are not required to be primes. Also a subsequence (namely, the prime terms) of A295014, where H, MM and SS must be primes, but not the concatenation HMMSS.

See A295000 for the subsequence of terms for which the number of seconds after midnight (3600*H + 60*MM + SS, listed in A295003) is also prime.

M. F. Hasler, Table of n, a(n) for n = 1..1211 (complete sequence).

Cf. A050246, A159911, A229106; A118848, A118849, A118850.

Cf. A295014, A295003, A295011, A295000, A295002.

With[{s = Prime@ Range@ PrimePi@ 60}, Select[FromDigits@ Flatten[PadLeft[IntegerDigits[#], 2] & /@ #] & /@ Tuples@ {TakeWhile[s, # < 24 &], s, s}, PrimeQ]] (* Michael De Vlieger, Jan 21 2018 *)

is_A295013(n)=apply(isprime,digits(n,100))==[1,1,1]&&n<24e4&&isprime(n)
A295013 = select( is_A295013, primes([20000,240000]))

A295002 Primes in A295003, the number of seconds after midnight corresponding to prime time primes A295013 (primes of the form HMMSS with primes H < 24 and MM, SS < 60).

Original entry on oeis.org

7351, 7417, 7433, 7507, 7639, 7673, 7691, 7867, 7993, 8059, 8233, 8287, 8293, 8369, 8377, 8623, 8647, 8677, 9001, 9013, 9091, 9103, 9127, 9133, 9157, 9439, 9461, 9463, 9467, 9473, 9697, 9739, 9817, 9839, 9851, 9859, 10453, 10753, 10771, 10837, 10867, 10949

Offset: 1

M. F. Hasler, Jan 15 2018

See A295000(n) = A055643(a(n)) for the corresponding "prime time primes", i.e., 6-digit clock displays. Reciprocally, the number of seconds given here is obtained through A292579 from the "super prime time primes" A295000.

M. F. Hasler, Table of n, a(n) for n = 1..404 (complete sequence).

Cf. A295000, A295003, A295013, A295011, A295014, A295004; A050246, A159911, A229106; A118848, A118849, A118850.

select( isprime, A295003) /* or */ apply(A292579,A295000)

a(n) = A292579(A295000(n))

A295003 The number of seconds after midnight corresponding to prime time primes, i.e., primes of the form HMMSS with primes H < 24 and MM, SS < 60, cf. A295013.

Original entry on oeis.org

7339, 7351, 7381, 7417, 7403, 7421, 7427, 7433, 7439, 7469, 7507, 7543, 7627, 7637, 7639, 7651, 7663, 7667, 7673, 7679, 7691, 7693, 7709, 7867, 7903, 7939, 7993, 7997, 7999, 8003, 8021, 8027, 8059, 8063, 8077, 8233, 8257, 8287, 8293, 8351, 8369, 8377, 8383

Offset: 1

M. F. Hasler, Jan 15 2018

See A295002 for the primes within this sequence, and A295000 for the corresponding 6-digit clock times.

M. F. Hasler, Table of n, a(n) for n = 1..1211 (complete sequence).

Cf. A295013, A295002, A295000, A295014, A295011; A050246, A159911, A229106; A118848, A118849, A118850.

With[{s = Prime@ Range@ PrimePi@ 60}, Select[NumberCompose[{#1, #2, #3}, {3600, 60, 1}] & @@ # & /@ Tuples@ {TakeWhile[s, # < 24 &], s, s}, PrimeQ]] (* Michael De Vlieger, Jan 21 2018 *)

apply( A292579, A295013) \\ convert prime time primes to seconds

cp's OEIS Frontend

A295004 The number of seconds after midnight (3600*H + 60*MM + SS) corresponding to prime time numbers A295014, i.e., numbers of the form HMMSS with primes H < 24 and MM, SS < 60.

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A295000 Prime time primes (of the form HMMSS with primes H < 24 and MM, SS < 60) such that the corresponding number of seconds after midnight is also prime.

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A295011 Numbers of the form HMMSS with primes H < 24 and MM, SS < 60, for which the number of seconds after midnight, 3600*H+60*MM+SS, is also prime.

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A295013 Prime time primes on 6-digit clocks, second definition: primes of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60.

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A295002 Primes in A295003, the number of seconds after midnight corresponding to prime time primes A295013 (primes of the form HMMSS with primes H < 24 and MM, SS < 60).

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A295003 The number of seconds after midnight corresponding to prime time primes, i.e., primes of the form HMMSS with primes H < 24 and MM, SS < 60, cf. A295013.

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A295004 The number of seconds after midnight (3600H + 60MM + SS) corresponding to prime time numbers A295014, i.e., numbers of the form HMMSS with primes H < 24 and MM, SS < 60.

A295011 Numbers of the form HMMSS with primes H < 24 and MM, SS < 60, for which the number of seconds after midnight, 3600H+60MM+SS, is also prime.