is 2 51401027 - 1
has 15473251 decimal digits
takes 94.164 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
Actual2704.648862.8571 %600000142500003.56935.7189 %8.218064.9813 %
Target27337.214164.3836 %340000550000008.81373.7995 %46.027965.7368 %
Difference-3-32.5654-1.5264 %+260000-40750000-5.2445+1.9194%-37.8098-0.7555 %

Known prime factors (1 factor, 70.1 bits, 0.00013642% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5140102712841561668065461527532270.12112491541918088
23 × 1561442739761
2012-02-25815614427397619.1479225,978422,063

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-12-09belezbarworkbox60000014250000--4.1294.306%
2012-02-25Roy OswaldManual testing2270.1212.4590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-10-15ANONYMOUSv4_computers212532.33000e-5
2000-02-16ANONYMOUSv4_computers212544.67000e-5
2000-04-19ANONYMOUSv4_computers212560.000
2001-05-13ANONYMOUSv4_computers212570.000
2002-02-17ANONYMOUSv4_computers212580.001
2003-10-14apocalypsev4_computers212600.001
2022-04-05LordJuliusManual testing260263
2008-11-27ANONYMOUS2632640.038
2008-12-03arnaudSRV-2202642650.073
2008-12-09arnaudSRV-2202652660.145
2008-12-15KYOJI_KAMEICBDC105C42662670.291
2009-04-17ANONYMOUSi72672680.582
2009-12-14arnaudSRV-1402682691.163
2011-08-03forrest-lumpkinHP_Netbook2692702.326


ECM factoring results:
No ECM results for M51401027


Lucas-Lehmer results:
No L-L results for M51401027


PRP results:
No PRP results for M51401027


CERT results:
No CERT results for M51401027


P-1 factor-bounds graph:
B1 = 600000, B2 = 14250000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 73
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00