so satisfying............(turbo mode recommended) BTW, 2^67 -1 was thought to be a prime number due to mersenne's last words, but was later proved that it had factors by Frank Nelson Cole, through his hour long presentation of 193,707,721 × 761,838,257,287. When asked how long it took to find this, he replied, "three years of Sundays" please comment your highest prime found below! i'll give you updates on the highest prime 15107 - me, 26/9/18 19417 (according to cloud data) me, 1/10/20
