is 2 77201561 - 1
has 23239986 decimal digits
takes 217.666 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
Actual27449.556863.5135 %720000149400006.11084.2362 %55.667765.0591 %
Target27449.556863.5135 %5000009000000021.97904.1979 %71.535865.0452 %
Difference---+220000-75060000-15.8682+0.0383%-15.8682+0.0140 %

Known prime factors (1 factor, 81.2 bits, 0.00010522% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7720156128462167025326013003678492581.23518433673268164884
22 × 1012 × 221603 × 2038607
2015-06-28221603203860711,7861.31071.8438

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-06-28tryptamine dreamerGridnine72000014940000622581.2356.1114.236%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-17ANONYMOUSv4_computers212531.55000e-5
2003-12-02ANONYMOUSv4_computers212610.002
2008-09-29JohnHa0Manual testing212650.048
2010-10-16ANONYMOUSgbgoo-pc2652660.097
2010-12-19ITSWUV2662670.194
2010-12-24ITSWUV2672680.387
2011-01-25ANONYMOUS2682690.774
2011-02-01ANONYMOUS2692701.549
2013-01-09SWL551Manual testing27027321.68
2015-06-08NickOfTimeManual testing27327424.78


ECM factoring results:
No ECM results for M77201561


Lucas-Lehmer results:
No L-L results for M77201561


PRP results:
No PRP results for M77201561


CERT results:
No CERT results for M77201561


P-1 factor-bounds graph:
B1 = 720000, B2 = 14940000 (P-1 stage 2)
B1 = 720000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
274
273
270
269
268
267
266
265
261
253
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