--- In primenumbers@y..., didier.boivin@g... wrote:
> I am glad to announce that a new big factoproth prime has been
> 13!*2^153294+1 is prime (46152 digits).
> This has been done with PFGW, taking into account that
> 13!=6227020800=6081075*2^10, and testing 6081075*2^k+1.
> Best regards.
> Didier BOIVIN
1962!*2^18712+1 with 11244 decimal digits was my first Top 5000 prime
back in 1999 using the old PrimeForm. I chose 1962 because I was born
in that year. Also 1962! is roughly 2^18712.
I see that 13! is small enough to use Chris Nash's optimized PFGW