is 2 12707501 - 1
has 3825339 decimal digits
takes 5.191 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7FADAE5F1BDAA413double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27275.257466.6667%600000129483354042.11947.8466%117.376869.2822%2.6155%
PrimeNet2640.280162.5000%5500017000000.08574.2602%0.365864.0976%1.5976%
GPU722684.690564.7059%9000022000000.12143.0979%4.811965.7992%1.0934%
Difference+4+70.5669+1.9608%+510000+1292633540+41.9980+4.7487%+112.5649+3.4830%+3.4830%

Known prime factors:
No known factors for M12707501

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-10-25T00:00:00ANONYMOUSv4_computers200000200000---0.118--0.941%
2015-05-12T13:37:00ThaManual testing3000006000000---0.362--3.035%
2021-12-31T03:06:11Luminescence5950X6000001294833540---42.12--7.847%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-01T00:00:00lalerav4_computers21256--0.001--
2000-08-17T00:00:00ANONYMOUSv4_computers21264--0.280--
2013-06-11T09:13:00lycornManual testing264265--0.294--
2014-04-21T00:25:00NesowaManual testing265266--0.588--
2015-04-03T11:36:00ThaManual testing266267--1.176--
2018-01-07T23:36:07ramgeisManual testing267268--2.352--
2018-01-07T23:36:07ramgeisManual testing268269--4.704--
2021-08-07T06:09:08SRBaseManual testing269270--9.409--
2021-08-30T15:59:51SRBaseManual testing270271--18.82--
2021-10-26T15:14:20-Anonymous-Manual testing271272--37.64--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.242 GHz-days
Estimated T-Level:0.100
DigitsB1CurvesCompleteFacMiss
20110002 / 1000.02098.010%
25500002 / 2800.00799.287%

New Calculation Method

Total ECM effort:1.242 GHz-days
Estimated T-Level:0.100
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000021.242


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-01-08T00:00:00ANONYMOUSv4_computers7FADAE5F1BDAA4135.191
2004-11-03T00:00:00kggv4_computers7FADAE5F1BDAA4135.191


PRP results:
No PRP results for M12707501


P-1 factor-bounds graph:
B1 = 600000, B2 = 1294833540 (P-1 stage 2)
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
104
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104
105
106
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109
1010
TF factor-bounds graph:
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Last modified: 2021-12-31T03:06:11+00:00