A365596 -id:A365596 - cp's OEIS frontend

A105982 Near-repdigit primes with at least two 2's as the repeated digit.

223, 227, 229, 2221, 22229, 22222223, 222222227, 22222222223, 22222222222229, 222222222222227, 222222222222222221, 2222222222222222222222222227, 222222222222222222222222222222222223

Offset: 1

Shyam Sunder Gupta, Apr 29 2005

			a(2)=227 is a term because all digits are equal to 2 except one.

Robert Price, Table of n, a(n) for n = 1..25

Cf. A105976, A105978, A105979, A105980, A105982, A365592, A365596, A365597, A365598.

Name clarified by Robert Price, Sep 10 2023

A105976 Near-repdigit primes with at least two 8's as the repeated digit.

Original entry on oeis.org

881, 883, 887, 8887, 88883, 888887, 88888883, 888888883, 888888887, 888888888887, 88888888888889, 888888888888883, 88888888888888889, 8888888888888888881, 88888888888888888888888888888888889

Offset: 1

Shyam Sunder Gupta, Apr 29 2005

			a(2)=883 is a term because all digits are equal to 8 except one.

Robert Price, Table of n, a(n) for n = 1..32

Cf. A105976, A105978, A105979, A105980, A105982, A365592, A365596, A365597, A365598.

Name clarified by Robert Price, Sep 10 2023

A105978 Near-repdigit primes with at least two 6's as the repeated digit.

Original entry on oeis.org

661, 6661, 666667, 66666667, 666666667, 6666666661, 66666666667, 666666666666666661, 66666666666666666667, 666666666666666666661, 6666666666666666666661, 66666666666666666666667, 6666666666666666666666666661

Offset: 1

Shyam Sunder Gupta, Apr 29 2005

			a(2)=6661 is a term because all digits are equal to 6 except one.

Harvey P. Dale, Table of n, a(n) for n = 1..33 (All terms with less than 1,000 digits)

Cf. A105976, A105978, A105979, A105980, A105982, A365592, A365596, A365597, A365598.

Select[FromDigits/@Flatten[Table[PadLeft[{pd},n,6],{pd,{1,7}},{n,3,30}],1],PrimeQ]//Sort (* Harvey P. Dale, Sep 01 2021 *)

More terms from Harvey P. Dale, Sep 01 2021

Name clarified by Robert Price, Sep 10 2023

A105980 Near-repdigit primes with at least two 4's as the repeated digit.

Original entry on oeis.org

443, 449, 4441, 4447, 44449, 444443, 444449, 444444443, 4444444447, 44444444441, 444444444443, 44444444444444444447, 44444444444444444444444447, 4444444444444444444444444441, 444444444444444444444444444443

Offset: 1

Shyam Sunder Gupta, Apr 29 2005

			a(2)=449 is a term because all digits are equal to 4 except one.

Harvey P. Dale, Table of n, a(n) for n = 1..26

Cf. A105976, A105978, A107979, A105980, A105982, A365592, A365596, A365597, A365598.

Select[Flatten[Table[FromDigits[PadLeft[{n},x,4]],{x,3,30},{n,{1,3,7,9}}]],PrimeQ] (* Harvey P. Dale, Feb 18 2018 *)

More terms from Harvey P. Dale, Feb 18 2018

Name clarified by Robert Price, Sep 10 2023

A105979 Near-repdigit primes with at least two 5's as the repeated digit.

Original entry on oeis.org

557, 5557, 555557, 55555553, 55555559, 5555555557, 555555555551, 555555555559, 5555555555551, 555555555555557, 555555555555555559, 5555555555555555555557, 55555555555555555555555553, 55555555555555555555555559, 55555555555555555555555555555559

Offset: 1

Shyam Sunder Gupta, Apr 29 2005

			5557 is a term because all digits are equal to 5 except one.

Robert Price, Table of n, a(n) for n = 1..25

Cf. A105976, A105978, A105979, A105980, A105982, A365592, A365596, A365597, A365598.

Name clarified by Robert Price, Sep 10 2023

A365592 Near-repdigit primes with at least two 1's as the repeated digit.

Original entry on oeis.org

113, 1117, 11113, 11117, 11119, 111119, 11111117, 11111119, 111111113, 11111111113, 11111111111111119, 1111111111111111111, 11111111111111111111111, 11111111111111111111117, 111111111111111111111113, 11111111111111111111111111117

Offset: 1

Robert Price, Sep 10 2023

			1117 is a term because all digits are equal to 1 except the last one.

Robert Price, Table of n, a(n) for n = 1..24

Cf. A105976, A105978, A107979, A105980, A105982, A365592, A365596, A365597, A365598.

A365597 Near-repdigit primes with at least two 7's as the repeated digit.

Original entry on oeis.org

773, 77773, 777777773, 777777777773, 7777777777771, 777777777777773, 77777777777777777771, 777777777777777777773, 77777777777777777777771, 7777777777777777777777777777771

Offset: 1

Robert Price, Sep 10 2023

			77773 is a term because all digits are equal to 7 except the last one.

Robert Price, Table of n, a(n) for n = 1..20

Cf. A105976, A105978, A105979, A105980, A105982, A365592, A365596, A365597, A365598.

A365598 Near-repdigit primes with at least two 9's as the repeated digit, and ending in a distinct digit.

Original entry on oeis.org

991, 997, 99991, 9999991, 99999999999999997, 999999999999999999999999999999991, 999999999999999999999999999999999999999999991

Offset: 1

Robert Price, Sep 10 2023

The usual definition of near-repdigit prime allows the distinct digit to be in any position, see A105975 for that (super) sequence.

			99991 is a term because all digits are equal to 9 except the last one.

Robert Israel, Table of n, a(n) for n = 1..15 (first 14 terms from Robert Price)

Subsequence of A105975.

Cf. A105976, A105978, A105979, A105980, A105982, A365592, A365596, A365597.

R:= NULL: count:= 0:
for n from 3 to 999 do
  for d in [9,3] do
    if isprime(10^n - d) then
      R:= R, 10^n-d; count:= count+1;
    fi
od od:
R;

Definition corrected by M. F. Hasler, Jun 20 2025

cp's OEIS Frontend

A105982 Near-repdigit primes with at least two 2's as the repeated digit.

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A105976 Near-repdigit primes with at least two 8's as the repeated digit.

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A105978 Near-repdigit primes with at least two 6's as the repeated digit.

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A105980 Near-repdigit primes with at least two 4's as the repeated digit.

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A105979 Near-repdigit primes with at least two 5's as the repeated digit.

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A365592 Near-repdigit primes with at least two 1's as the repeated digit.

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A365597 Near-repdigit primes with at least two 7's as the repeated digit.

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A365598 Near-repdigit primes with at least two 9's as the repeated digit, and ending in a distinct digit.

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