A073914 -id:A073914 - cp's OEIS frontend

A139053 Array read by rows: row n lists the first 3 primes with n digits.

2, 3, 5, 11, 13, 17, 101, 103, 107, 1009, 1013, 1019, 10007, 10009, 10037, 100003, 100019, 100043, 1000003, 1000033, 1000037, 10000019, 10000079, 10000103, 100000007, 100000037, 100000039, 1000000007, 1000000009, 1000000021, 10000000019, 10000000033, 10000000061

Offset: 1

Omar E. Pol, Apr 08 2008

Michael S. Branicky, Table of n, a(n) for n = 1..3000

Cf. A000040, A003617, A073914, A139052, A139054.

np[n_]:=Module[{a=NextPrime[10^n]},{a,NextPrime[a], NextPrime[NextPrime[ a]]}]; Flatten[Array[np,12,0]] (* Harvey P. Dale, Dec 14 2011 *)
Flatten@Array[NextPrime[10^#,{1,2,3}]&,12,0] (* Giorgos Kalogeropoulos, May 06 2019 *)

from sympy import nextprime
def auptodigs(maxdigits):
  alst = []
  for n in range(1, maxdigits+1):
    p1 = nextprime(10**(n-1))
    p2 = nextprime(p1)
    p3 = nextprime(p2)
    alst.extend([p1, p2, p3])
  return alst
print(auptodigs(11)) # Michael S. Branicky, May 07 2021

More terms from Max Alekseyev, Dec 12 2011

a(32) and beyond from Michael S. Branicky, May 07 2021

A139054 Array read by rows: row n lists the first 4 primes with n digits.

Original entry on oeis.org

2, 3, 5, 7, 11, 13, 17, 19, 101, 103, 107, 109, 1009, 1013, 1019, 1021, 10007, 10009, 10037, 10039, 100003, 100019, 100043, 100049, 1000003, 1000033, 1000037, 1000039, 10000019, 10000079, 10000103, 10000121, 100000007, 100000037, 100000039, 100000049

Offset: 1

Omar E. Pol, Apr 08 2008

First differs from A000040 at a(9). - Omar E. Pol, Feb 13 2014

			Array begins:
    2,   3,   5,   7;
   11,  13,  17,  19;
  101, 103, 107, 109;
  ...

Cf. A000040, A003617, A073914, A139052, A139053.

Flatten @ Table[ NextPrime[10^i, Range @ 4], {i, 0, 9}] (* Mikk Heidemaa, Jan 08 2023 *)

a(4n-3) = A003617(n). - Omar E. Pol, Feb 13 2014

More terms from Michel Marcus, Feb 13 2014

A139052 Array read by rows: row n lists the first two primes with n digits.

Original entry on oeis.org

2, 3, 11, 13, 101, 103, 1009, 1013, 10007, 10009, 100003, 100019, 1000003, 1000033, 10000019, 10000079, 100000007, 100000037, 1000000007, 1000000009, 10000000019, 10000000033, 100000000003, 100000000019, 1000000000039, 1000000000061

Offset: 1

Omar E. Pol, Apr 08 2008

Cf. A000040, A003617, A073914, A139053, A139054.

ftp[d_]:=Module[{np1=NextPrime[10^(d-1)]},{np1,NextPrime[np1]}]; Array[ ftp,15]//Flatten (* Harvey P. Dale, Mar 27 2021 *)

More terms from Sean A. Irvine, Jun 02 2011

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A139053 Array read by rows: row n lists the first 3 primes with n digits.

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A139054 Array read by rows: row n lists the first 4 primes with n digits.

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A139052 Array read by rows: row n lists the first two primes with n digits.

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