mnementh$ primes 1 > /tmp/zz9.primes
mnementh$ md5sum /tmp/zz9.primes 
037a526651ff4d6babb3b1a23bb83097  /tmp/zz9.primes

...right?

(That's the standard BSD primes(6). 2^32-1 is as high as it will go, so it's only just good enough for this job...)

That's the one – turns up the same single Google hit as I got.

I only found out about primes(6) after I wrote mine. But I made sure mine did go higher than 2^32, even if I didn't ask it to on this occasion...