is 2 102108401 - 1
has 30737692 decimal digits
takes 406.555 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
Actual276149.879964.4737 %8500008500004.90731.6084 %154.787265.0451 %
Target276149.879964.4737 %65000011000000038.14833.8502 %188.028265.8415 %
Difference---+200000-109150000-33.2410-2.2418 %-33.2410-0.7964 %

Known prime factors (1 factor, 77.8 bits, 0.00007623% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1021084012707929409312785389497932477.8421326007156508496
24 × 32 × 7 × 11 × 17 × 103 × 131 × 521357
2021-01-08131521357539.570.16470.3063

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-01-08Ben Deloi-0fb3983245c2c604a85000085000012477.8425.0551.608%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-05-171997rj7Manual testing2632640.019
2010-08-16Torchwood InstitutePhenom95502642650.037
2012-04-20OS1corner32652660.073
2013-10-16ANONYMOUS2662670.146
2013-10-22ANONYMOUS2672680.293
2014-10-08SMoffatManual testing2682690.585
2014-10-12SMoffatManual testing2692701.171
2014-10-20ANONYMOUSManual testing2702712.342
2014-10-20mhskManual testing2702712.342
2014-12-07PEDManual testing2712724.684
2020-03-06el groccoManual testing2722739.368
2020-03-29SRBaseManual testing27327418.74
2020-10-14RichD0Manual testing27427537.47
2020-10-15Mark RoseManual testing27527674.94


ECM factoring results:
No ECM results for M102108401


Lucas-Lehmer results:
No L-L results for M102108401


PRP results:
No PRP results for M102108401


CERT results:
No CERT results for M102108401


P-1 factor-bounds graph:
B1 = 850000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
TF factor-bounds graph:
276
275
274
273
272
271
270
269
268
267
266
265
264
this exponent TF target: 76
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00