is 2 4371529 - 1
has 1315962 decimal digits
takes 0.545 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LA1944D3895AFBCD1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272218.764168.0556%620000032756371830323.810512.8360%542.574672.1559%4.1004%
Target2651.668964.6154%240005000000.00901.9876%1.677965.3187%0.7033%
Difference+7+217.0952+3.4402%+6176000+32755871830+323.8015+10.8484%+540.8967+6.8373%+3.3971%

Known prime factors (1 factor, 139.8 bits, 0.00319696% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4371529117682445095637646983184815408093067059371343139.756134601011563274139303645035190311064
23 × 3 × 7 × 9241 × 14951 × 15101 × 330821 × 2734817 × 424446329
2022-12-1827348174244463294.031e+104.64977.8110

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-05T04:56:00Carsten Kossendeydurandal25000356250---0.008--0.661%
2012-01-04T02:41:00Squeeky_SquirrelT7500_22001100002255000---0.041--1.709%
2018-10-26T12:10:31Ismo Laitela6600K21894646349445812---1.000--5.381%
2022-12-18T06:57:54DRobinsonPE5800X62000003275637183043139.756323.81.090647.612.836%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-06-01T00:00:00ANONYMOUSv4_computers21261--0.070--
2010-11-16T03:07:00markrut261262--0.070--
2012-02-10T17:48:00GrunwalderGIMPManual testing21263--0.365--
2016-02-23T16:38:49Mark RoseManual testing262263--0.225--
2014-07-12T09:29:00JayderManual testing263264--0.449--
2014-07-12T14:36:00lycornManual testing264265--0.855--
2015-06-18T21:17:00snme2pm1Manual testing265266--1.709--
2018-05-03T02:24:25chuenkitManual testing266267--3.419--
2018-10-29T01:12:49chuenkitManual testing267268--6.838--
2021-01-25T20:02:16-Anonymous-Manual testing268269--13.68--
2021-01-25T20:02:16-Anonymous-Manual testing269270--27.35--
2021-01-31T04:05:08-Anonymous-Manual testing270271--54.70--
2021-01-31T04:05:08-Anonymous-Manual testing271272--109.4--


ECM factoring results:
Total ECM effort:2.202 GHz-days
Estimated T-Level:2.308
DigitsB1CompleteFacMiss
20110000.46263.031%
25500000.04395.819%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
500005000000122.202


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-21T00:00:00ANONYMOUSv4_computersA1944D3895AFBCD10.545
1999-10-29T00:00:00ANONYMOUSv4_computersA1944D3895AFBCD10.545


PRP results:
dateuseridcompidcofactorsres64PRP
2022-12-23T19:48:35Perigbrollach
1176824450956376469831848154080930670593713
AD4115265487D0BEno


P-1 factor-bounds graph:
B1 = 6200000, B2 = 32756371830 (P-1 stage 2)
B1 = 6200000 (P-1 stage 1)
B1 = 2189464, B2 = 63494458 (P-1 stage 2)
B1 = 2189464 (P-1 stage 1)
B1 = 110000, B2 = 2255000 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 25000, B2 = 356250 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-12-23T19:48:35+00:00