is 2 1901329 - 1
has 572358 decimal digits
takes 0.103 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9A3361C57CAA0DACdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26831.349169.1176%80000003200000001.96659.7313%33.315572.1229%3.0053%
PrimeNet2570.010163.1579%90001600000.00143.0384%0.011564.2773%1.1194%
GPU722610.161665.5738%100001600000.00141.7276%0.163066.1685%0.5947%
Difference+7+31.1875+3.5439%+7990000+319840000+1.9650+8.0037%+33.1525+5.9544%+5.9544%

Known prime factors (1 factor, 72.7 bits, 0.00382152% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
190132974597280879236106794872272.6601961714171488367
199 × 9857860158233
2020-04-161999857860158233560.3742,24878,908

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-08-03T00:00:00Jocelyn Larouchev4_computers25000343750---0.003--1.009%
2011-02-11T06:18:00Carsten Kossendeyleela1050001785000---0.015--2.280%
2011-06-12T06:36:00kurlykk100000030000000---0.203--5.679%
2017-11-22T14:30:39mikrS065800000032000000012---1.966--9.731%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-02-05T00:00:00GrunwalderGIMPv4_computers21256--0.005--
2011-02-05T00:00:00GrunwalderGIMPv4_computers256257--0.005--
2001-12-22T00:00:00Jocelyn Larouchev4_computers21258--0.020--
2011-02-05T00:00:00GrunwalderGIMPv4_computers257258--0.010--
2011-02-05T00:00:00GrunwalderGIMPv4_computers258259--0.020--
2011-02-05T00:00:00GrunwalderGIMPv4_computers259260--0.040--
2011-02-05T00:00:00GrunwalderGIMPv4_computers260261--0.081--
2009-05-24T06:55:00Architects Cubedi4l_1260261--0.081--
2011-01-11T11:54:00GrunwalderGIMPGWPrime02261262--0.162--
2011-01-11T15:23:00GrunwalderGIMPGWPrime02262263--0.516--
2015-05-20T10:34:00monstManual testing263264--1.033--
2015-05-20T10:35:00monstManual testing264265--1.965--
2015-08-30T20:42:00ramgeisManual testing265266--3.930--
2017-03-02T09:39:39Smok_bmvManual testing266267--7.861--
2019-04-25T12:32:13chuenkitManual testing267268--15.72--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.702 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:18.702 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.4190.022%
25500000.76246.666%
302500000.04795.401%
3510000000.00299.784%


ECM Summary

B1B2factorcurvesGHz-days
5000050000001057.284
50000500000010.069
50000660000014511.35


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00ANONYMOUSv4_computers9A3361C57CAA0DAC0.103
2015-07-14T15:04:00MadPooManual testing9A3361C57CAA0DAC0.103


PRP results:
dateuseridcompidcofactorsres64PRP
2020-04-16T20:30:44mrh.orgw
7459728087923610679487
314BD98E89330798no
2020-04-18T00:22:20Oliver KruseThreadripper-PC
7459728087923610679487
314BD98E89330798no


P-1 factor-bounds graph:
B1 = 8000000, B2 = 320000000 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 105000, B2 = 1785000 (P-1 stage 2)
B1 = 105000 (P-1 stage 1)
B1 = 25000, B2 = 343750 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-10T12:35:34+00:00