Message boards : Number crunching : Results of bases
S836_700-800k double check done
R402 tested to n=700k (600-700K) 1 prime found, base proven 32*402^683113-1 found by Science United (TOP5000)
R931 tested to n=500k (400-500K) nothing found, 2 remain
R19 tested to n=250k (200-250K) 55 primes found, 692 remain (+ 3 duplicate k-values are prime)