A255388 Primes of the form 157^k - 156^k.

313, 73477, 102850464108757, 2202194587566133922938215539676032221

Offset: 1

Author

Michael P. May, Feb 21 2015

Keywords

• nonn

Comments

a(5) has 1452 digits. - Vincenzo Librandi, Feb 22 2015

The values of k are 2, 3, 7, 17, 661, ... - Jinyuan Wang, May 30 2020

Links

• Michael P. May, On the Existence and Frequency Distribution of the Shell Primes, arXiv preprint arXiv:1510.01028 [math.CO], 2015.

Crossrefs

Cf. A254298.

Programs

Magma

[a: n in [0..600] | IsPrime(a) where a is 157^n-156^n]; // Vincenzo Librandi, Feb 22 2015

Mathematica

Select[Table[157^n - 156^n, {n, 1000}], PrimeQ] (* Vincenzo Librandi, Feb 22 2015 *)