[seqfan] Re: Software for searching for Wolstenholme primes?

[Hans Havermann]

Georgi Guninski:

> Hmmm, according to the internet the search for Wolstenholme primes  
> is only up to 10^9.

After your initial post, I naively tried to verify (in Mathematica)  
the primes to this limit. It took a two-year-old machine 4.2 hours to  
get to the second Wolstenholme prime (2124679). I realized then that I  
wasn't going to achieve that goal and that it was for a similar reason  
(the difficulty of fast-computing the binomial) that researchers with  
better means hadn't progressed beyond 10^9.