is 2 14241881 - 1
has 4287234 decimal digits
takes 6.820 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L59A7B7F8DE23ECA9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27267.149466.6667%200000096743361037.91338.9017%105.062769.6339%2.9672%
PrimeNet2650.512363.0769%6000019000000.11134.0120%0.623564.5583%1.4813%
GPU722698.382865.2174%10000024000000.15652.9178%8.539266.2323%1.0149%
Difference+3+58.7666+1.4493%+1900000+965033610+37.7568+5.9839%+96.5234+3.4016%+1.9523%

Known prime factors (1 factor, 122.9 bits, 0.00086288% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14241881985981804516985730634831957793275964937122.891346155751658431119679637808304
24 × 23 × 607 × 1013 × 1231 × 27017 × 1378373 × 33370573
2022-02-251378373333705739.252e+92.16752.3580

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-01-22T00:00:00ANONYMOUSv4_computers1600001960000---0.179--2.136%
2022-02-25T10:00:08Architects Cubedburrow200000096743361037122.89137.9113.6475.838.902%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-17T00:00:00Net_Forcev4_computers21256--0.001--
2000-11-25T00:00:00ANONYMOUSv4_computers21265--0.512--
2014-08-01T14:09:00NesowaManual testing265266--0.525--
2015-08-30T20:11:00ThaManual testing266267--1.049--
2018-02-05T20:32:05ramgeisManual testing267268--2.099--
2018-02-05T20:32:05ramgeisManual testing268269--4.198--
2021-08-08T08:04:58SRBaseManual testing269270--8.395--
2021-09-01T16:51:30SRBaseManual testing270271--16.79--
2021-10-15T18:42:13-Anonymous-Manual testing271272--33.58--


ECM factoring results:
Total ECM effort:0.728 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-04-07T00:00:00ANONYMOUSv4_computers59A7B7F8DE23ECA96.820
2005-06-05T00:00:00ANONYMOUSv4_computers59A7B7F8DE23ECA96.820


PRP results:
No PRP results for M14241881


P-1 factor-bounds graph:
B1 = 2000000, B2 = 967433610 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 160000, B2 = 1960000 (P-1 stage 2)
B1 = 160000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-02-25T10:00:08+00:00