is 2 66712759 - 1
has 20082542 decimal digits
takes 168.635 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27457.348364.8649 %6000006000002.19921.6351 %59.547565.4394 %
Target27457.348364.8649 %4500007500000016.53663.9263 %73.884966.2444 %
Difference---+150000-74400000-14.3374-2.2912 %-14.3374-0.8050 %

Known prime factors (1 factor, 84.3 bits, 0.00012632% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
66712759233200903053184449396165292684.270174779837132192696
23 × 43 × 593 × 1973 × 2767 × 156943
2014-09-06276715694399,0990.04090.0585

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-09-06ixfd64andromeda60000060000012684.2702.1991.635%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2009-03-161997rj7Manual testing212640.029
2009-04-01Gnorfe_r-gamer2642650.056
2009-04-25unconnectedgreece-E84002652660.112
2010-05-21Lawrence V. Castiglione IIICirl2662670.224
2010-05-22S80_UKGodmanchester_Goblin2672680.448
2010-05-25sunithayaboxx2682690.896
2012-05-15el grocco2692701.792
2013-05-01ANONYMOUS2702713.584
2014-03-29dragonbud20Manual testing27127321.51
2014-04-03c10ck3rManual testing27327428.68


ECM factoring results:
No ECM results for M66712759


Lucas-Lehmer results:
No L-L results for M66712759


PRP results:
No PRP results for M66712759


CERT results:
No CERT results for M66712759


P-1 factor-bounds graph:
B1 = 600000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
TF factor-bounds graph:
274
273
271
270
269
268
267
266
265
264
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00