is 2 5055133 - 1
has 1521747 decimal digits
takes 0.701 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9C06E141BE635BF0double-checked
PRP95A13B91B32C27D2verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272189.180768.0556%1500000450000000.77784.9521%189.958569.6375%1.5819%
PrimeNet2610.060862.2951%220005000000.00973.4045%0.070463.5787%1.2837%
GPU722651.443264.6154%340007000000.01412.4205%1.457465.4719%0.8565%
Difference+7+187.7375+3.4402%+1466000+44300000+0.7637+2.5316%+188.5012+4.1656%+4.1656%

Known prime factors (1 factor, 74.4 bits, 0.00147172% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5055133248819473325828298143592374.3982461057635138663
3 × 11 × 761 × 1607 × 60982793
2021-10-30160760982793924.420.66811.2472

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2006-01-15T00:00:00Jocelyn Larouchev4_computers5000050000---0.010--0.326%
2009-07-29T13:18:00harleeP4_2600600001065000---0.023--1.236%
2017-06-25T10:36:29mikrS05115000004500000012---0.778--4.952%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-10-30T23:36:38ATH5960X25000009250000027P-12374.3981.730


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-05-23T00:00:00ANONYMOUSv4_computers21261--0.061--
2008-08-31T06:48:00Sturle Sundelara261262--0.061--
2009-08-08T04:04:00GrunwalderGIMPManual testing21263--0.316--
2016-02-23T16:39:07Mark RoseManual testing262263--0.194--
2014-09-03T01:17:00krackerManual testing263264--0.388--
2014-09-14T19:48:00monstManual testing264265--0.739--
2015-08-01T23:20:00snme2pm1Manual testing265266--1.478--
2016-05-20T16:48:11Gordon SpenceManual testing266267--2.956--
2018-06-11T12:29:28ramgeisManual testing267268--5.913--
2021-02-08T11:47:16TJAOIManual testing268269--11.83--
2021-04-01T10:40:50-Anonymous-Manual testing269270--23.65--
2021-04-01T10:40:50-Anonymous-Manual testing270271--47.30--
2021-04-03T17:56:51-Anonymous-Manual testing271272--94.61--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.897 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.897 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.29074.802%
25500000.02697.410%
302500000.00299.839%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.897


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13T00:00:00ANONYMOUSv4_computers9C06E141BE635BF00.701
2000-04-19T00:00:00ANONYMOUSv4_computers9C06E141BE635BF00.701


PRP results:
dateuseridcompidcofactorsres64PRP
2021-10-31T03:44:52ATHec2-PRPCFDC
24881947332582829814359
95A13B91B32C27D2no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 92500000 (P-1 stage 2)
B1 = 1500000, B2 = 45000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 1500000 (P-1 stage 1)
B1 = 60000, B2 = 1065000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-10-31T03:44:52+00:00