is 2 76410953 - 1
has 23001989 decimal digits
takes 212.651 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
Actual275100.141564.0000 %6650006650002.68351.5542 %102.825064.5595 %
Target27450.069663.5135 %5000009000000021.69484.1926 %71.764465.0432 %
Difference+1+50.0719+0.4865 %+165000-89335000-19.0113-2.6384 %+31.0606-0.4837 %

Known prime factors (1 factor, 83.1 bits, 0.00010872% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
76410953101686131631764072432382572683.07266538976180393976
23 × 3 × 7 × 29 × 157 × 208001 × 418219
2016-03-2020800141821927,5010.88561.7082

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-20TheJudgerManual testing66500066500012683.0722.7191.744%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-10-15ANONYMOUSv4_computers212502.00000e-6
2000-08-10ANONYMOUSv4_computers212531.57000e-5
2003-12-13markrv4_computers212620.004
2008-06-021997rj7v4_computers212640.026
2011-03-07Chun sung sooyou2642650.049
2011-03-08JMGarciasede_vacante2652660.098
2011-03-09JMGarciasede_vacante2662670.196
2011-03-10JMGarciasede_vacante2672680.391
2011-03-16Stuart Thompsonserver2682690.782
2011-03-24Stuart Thompsonserver2692701.565
2012-12-17AllRandomManual testing2702713.129
2013-08-05DRHManual testing27127318.78
2016-02-26endless_mikeManual testing27327575.11


ECM factoring results:
No ECM results for M76410953


Lucas-Lehmer results:
No L-L results for M76410953


PRP results:
No PRP results for M76410953


CERT results:
No CERT results for M76410953


P-1 factor-bounds graph:
B1 = 665000 (P-1 stage 1)
104
105
106
104
105
106
TF factor-bounds graph:
275
273
271
270
269
268
267
266
265
264
262
253
250
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00