is 2 75966881 - 1
has 22868310 decimal digits
takes 210.026 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275100.726964.0000%6250006250002.50551.5110%103.232464.5440%0.5440%
PrimeNet2703.145561.4286%320000140000004.27075.5661%7.416163.5755%2.1469%
GPU7227450.362363.5135%500000180000005.82664.1896%56.188965.0421%1.5286%
Difference+1+50.3646+0.4865%+125000-17375000-3.3211-2.6786%+47.0435-0.4982%-0.4982%

Known prime factors (1 factor, 80.9 bits, 0.00010656% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7596688123317874132811686489403532580.94815347394697441696
25 × 23 × 37 × 59 × 85369 × 111893
2015-04-19853691118933,736.80.34800.6965

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-04-19T22:41:00gurus16250006250002580.9482.506420.15.0111.511%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-06-02T18:29:00Architects Cubedm1_17263264--0.026--
2010-10-21T15:19:00Cereal Business264265--0.049--
2010-10-23T22:04:00Cereal Business265266--0.098--
2010-10-27T15:36:00Cereal Business266267--0.197--
2010-10-31T08:03:00Cereal Business267268--0.393--
2011-01-10T08:44:00ANONYMOUS268269--0.787--
2011-01-11T05:13:00ANONYMOUSiloveeggs269270--1.574--
2012-12-22T18:37:00SWL551Manual testing270271--3.148--
2012-12-22T18:37:00SWL551Manual testing271272--6.296--
2015-04-09T19:50:00NickOfTimeManual testing272273--12.59--
2015-04-09T19:50:00NickOfTimeManual testing273274--25.18--
2015-04-09T19:50:00NickOfTimeManual testing274275--50.36--


ECM factoring results:
No ECM results for M75966881


Lucas-Lehmer results:
No L-L results for M75966881


PRP results:
No PRP results for M75966881


P-1 factor-bounds graph:
B1 = 625000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
275
274
273
272
271
270
269
268
267
266
265
264
250
260
270
280
290
2100
Last modified: 2015-04-19T22:41:00+00:00