Getting ready for Pi-Day

[mnrvovrfc]

But there is an interest in getting larger and larger primes to factor really huge numbers. And so the search for ever higher primes goes just as obsessively if not more so than the search for more digits to pi.

I was sticking up the only computer I had a couple of years ago, to a QB64-created program that computed prime numbers quite close to 18 trilliard (unsigned 64-bit high limit). It was slow by standards of supercomputers of the 1980's but it was still blazing fast in my experience, especially my first IBM PC-compatible ever, Tandy1000HX. I would have to dig deep into my backups but perhaps I could post the program here. I'm going to start another thread for it, not this about the "circle" number.

The true aim of that program was to obtain a prime number that long which was palindromic.