is 2 76163671 - 1
has 22927550 decimal digits
takes 211.962 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
Actual275100.466664.0000 %6250006250002.52211.5116 %102.988764.5442 %
Target27450.232263.5135 %5000009000000021.69484.1909 %71.926965.0426 %
Difference+1+50.2345+0.4865 %+125000-89375000-19.1727-2.6793 %+31.0618-0.4985 %

Known prime factors (1 factor, 78.1 bits, 0.00010249% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
761636713154506359739309147646492478.0622070873369364844
22 × 112 × 97 × 827 × 6673 × 7993
2015-07-2266737993811.400.02720.0548

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-07-22guruw362500062500012478.0622.5551.698%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-10ANONYMOUSv4_computers212531.58000e-5
2003-10-14markrv4_computers212620.004
2008-03-111997rj7v4_computers212640.026
2010-10-23Wolfgang Stegerff-beogate2642650.049
2010-10-26MarzbugXeon2652660.098
2010-10-30PerendiePC2D2662670.196
2010-11-04PerendiePC2D2672680.392
2010-11-09PerendiePC2D2682690.785
2010-11-16PerendiePC2D2692701.570
2012-12-21Per Jessenlouiswu72702713.140
2015-07-07el groccoManual testing2712726.279
2015-07-141997rj7Manual testing27227312.56
2015-07-20Tim SorberaManual testing27327575.35


ECM factoring results:
No ECM results for M76163671


Lucas-Lehmer results:
No L-L results for M76163671


PRP results:
No PRP results for M76163671


CERT results:
No CERT results for M76163671


P-1 factor-bounds graph:
B1 = 625000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
TF factor-bounds graph:
275
273
272
271
270
269
268
267
266
265
264
262
253
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00