cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A255209 Primes p for which exactly six bases b with 1 < b < p exist such that p is a base b Wieferich prime.

Original entry on oeis.org

5107, 20771, 51427, 52517, 61417, 66161, 116731, 119359, 128657, 140741, 147647, 150559, 199783, 203773, 213949, 229939, 237283, 261761, 286751, 288929, 303089, 339139, 342373, 381853, 384611, 385657, 475897
Offset: 1

Views

Author

Felix Fröhlich, Feb 17 2015

Keywords

Comments

p = prime(n) such that A242830(n) = 6.

Crossrefs

Programs

  • PARI
    forprime(p=1, , b=2; i=0; while(b < p, if(Mod(b, p^2)^(p-1)==1, i++); b++); if(i==6, print1(p, ", ")))