is 2 1983097 - 1
has 596972 decimal digits
takes 0.130 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB363A9B2CCD4BD79double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26830.056569.1176%1200000032849847030171.712016.3520%201.768574.1675%5.0499%
PrimeNet2580.019463.7931%80001400000.00142.4748%0.020864.6891%0.8960%
GPU722620.309866.1290%80001000000.00121.1976%0.311066.5347%0.4056%
Difference+6+29.7467+2.9886%+11992000+32849747030+171.7108+15.1544%+201.4575+7.6329%+4.6442%

Known prime factors (1 factor, 130.2 bits, 0.00656730% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1983097160284528338590123795837093830019697266340130.236404126798483861666362858432618323
32 × 11 × 13 × 41 × 6229 × 24247 × 181537 × 735739 × 379655741
2022-02-217357393796557419.040e+102.03833.6832

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-20T11:12:00kurlyhex100000030000000---0.246--5.707%
2018-01-27T10:55:54Jocelyn Larouchelow 4M19830973000000012---0.335--6.068%
2018-02-14T16:46:05Jocelyn Larouchelow 4M19830976000000012---0.490--6.855%
2018-03-11T02:36:12Jocelyn Larouchelow 4M198309712000000012---0.802--7.649%
2018-05-21T11:06:49Jocelyn Larouchelow 4M198309719830970012---1.209--8.228%
2018-11-26T12:53:52Jocelyn LaroucheManual testing198309724788712512---1.466--8.487%
2022-02-21T20:41:43RichD0Linux-0b120000003284984703040130.236171.70.261343.416.352%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-27T00:00:00ANONYMOUSv4_computers21258--0.019--
2016-02-23T16:29:02Mark RoseManual testing258260--0.058--
2009-12-17T20:59:00S485122USB-W260261--0.077--
2016-02-23T16:29:02Mark RoseManual testing261262--0.155--
2011-07-01T19:06:00GrunwalderGIMPManual testing21263--0.805--
2016-02-23T16:29:02Mark RoseManual testing262263--0.495--
2015-03-13T20:26:00lycornManual testing263264--0.990--
2015-03-13T20:27:00lycornManual testing264265--1.884--
2015-09-11T08:33:00ramgeisManual testing265266--3.768--
2018-01-15T16:18:56TJAOIManual testing266267--7.536--
2019-05-18T08:32:08chuenkitManual testing267268--15.07--


ECM factoring results:
Total ECM effort:22.028 GHz-days
Estimated T-Level:24.553
DigitsB1CompleteFacMiss
20110009.7830.006%
25500000.91140.225%
302500000.05894.402%
3510000000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
50000500000019416.39
50000643387870.660
500007500000494.976


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-17T00:00:00ANONYMOUSv4_computersB363A9B2CCD4BD790.130
2015-07-12T18:10:00MadPooManual testingB363A9B2CCD4BD790.130


PRP results:
dateuseridcompidcofactorsres64PRP
2022-02-22T08:37:51LordJuliusWhiteBox
1602845283385901237958370938300196972663
AB742471F8E7F84Ano
2022-02-22T19:16:26RichD0Linux-7
1602845283385901237958370938300196972663
AB742471F8E7F84Ano


P-1 factor-bounds graph:
B1 = 12000000, B2 = 32849847030 (P-1 stage 2)
B1 = 1983097, B2 = 247887125 (P-1 stage 2)
B1 = 1983097, B2 = 198309700 (P-1 stage 2)
B1 = 12000000 (P-1 stage 1)
B1 = 1983097, B2 = 120000000 (P-1 stage 2)
B1 = 1983097, B2 = 60000000 (P-1 stage 2)
B1 = 1983097, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1983097 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-08-09T09:43:16+00:00