[plxztbea] Pierpont primes with primitive root 2

Pierpont primes have the form 1 + 2^a * 3^b.  We restrict our attention to the subset of Pierpont primes for which

[dyrnrrin] Quick partial factorization and isprimroot in Pari/GP

\\ return the last composite in a possibly incomplete factorization, or 2 if it is a complete prime factorization. 

[fneixtxj] Multiplicative groups of some primes below 2^127

Here is some Pari/GP (Version 2.9.4) code calculating the 64 largest primes less than 2^127, a 39-digit number.  T

[xoartqzd] Large primes with generator 2

We use isprimroot_approx to find primes less than certain powers of 2 which have 2 as a primitive root.  Note that

[rffzzbpi] CA with mostly local neighborhood

Consider cellular automata in which a cell's next state depends on both its local neighborhood and a few possible dista