A228241 Log 10-primes: primes in the initial decimal digits of log(10).

2, 23, 2302585092994045684017991454684364207601

Offset

1,1

Comments

The next term (a(4)) has 242 digits. - Harvey P. Dale, Sep 13 2021

Links

Eric W. Weisstein, Table of n, a(n) for n = 1..5

Eric Weisstein's World of Mathematics, Constant Primes

Eric Weisstein's World of Mathematics, Integer Sequence Primes

Eric Weisstein's World of Mathematics, Natural Logarithm of 10 Digits

Mathematica

Module[{nn=500, l10}, l10=RealDigits[Log[10], 10, nn][[1]]; Select[ Table[ FromDigits[ Take[l10, n]], {n, nn}], PrimeQ]] (* Harvey P. Dale, Sep 13 2021 *)

Crossrefs

Cf. A228240 (integer lengths of log(10)-primes).

Cf. A002392 (decimal expansion of log(10)).

Sequence in context: A089987 A162605 A118812 * A054909 A171636 A350257

Adjacent sequences: A228238 A228239 A228240 * A228242 A228243 A228244

Keyword

nonn,base

Author

Eric W. Weisstein, Aug 17 2013

Status

approved