15 Jul
2007
15 Jul
'07
11:10 p.m.
Maksym Voznyy and Anton Budnyy report (on NMBRTHRY) the probable prime repunit number R(270343) (consisting of 270343 1s, base 10). Known repunit primes are R(2), R(19), R(23), R(317), and R(1031). Known PRP repunits are R(49081), R(86453), and R(109297). Nothing is said about intermediate values. I believe I saw a recent report that all P<250K have been examined. Rich