is 2 4970551 - 1
has 1496285 decimal digits
takes 0.689 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L2027922F6184AB19double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272192.399968.0556%7000000897565851099.616211.6195%292.016171.7673%3.7118%
PrimeNet2610.061862.2951%220004500000.00913.3100%0.070963.5431%1.2480%
GPU722651.467864.6154%340007000000.01412.4136%1.481965.4694%0.8540%
Difference+7+190.9321+3.4402%+6966000+8974958510+99.6021+9.2059%+290.5342+6.2979%+2.8577%

Known prime factors (1 factor, 127.2 bits, 0.00255884% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
497055119389736210368850396126879889473036027939127.18919504614488784895674671560446189
3 × 113 × 127 × 487 × 5279 × 1945261 × 2669873 × 33930077
2022-10-272669873339300773.592e+100.87891.0921

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-08-10T00:00:00ANONYMOUSv4_computers2000020000---0.004--0.152%
2009-12-02T02:54:00markrlounge750001500000---0.031--1.433%
2015-04-24T01:35:00mikrMSI120000043100000---0.700--4.786%
2022-10-26T17:34:08Prism Daymonristaccia7000000897565851039127.18999.61.378199.211.619%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:39:06Mark RoseManual testing21261--0.062--
2009-12-13T00:27:00markroldgamer261262--0.062--
2011-08-27T22:56:00GrunwalderGIMPManual testing21263--0.321--
2016-02-23T16:39:06Mark RoseManual testing262263--0.197--
2014-12-29T19:37:00VictordeHollanderManual testing263264--0.395--
2014-12-29T19:37:00VictordeHollanderManual testing264265--0.752--
2015-07-29T21:29:00snme2pm1Manual testing265266--1.503--
2017-05-28T15:16:46YxinityManual testing266267--3.007--
2018-06-05T09:54:11ramgeisManual testing267268--6.014--
2021-03-08T12:34:11TJAOIManual testing268269--12.03--
2021-04-23T23:13:25-Anonymous-Manual testing269270--24.05--
2021-04-24T20:27:09-Anonymous-Manual testing270271--48.11--
2021-04-26T10:59:33-Anonymous-Manual testing271272--96.22--


ECM factoring results:
Total ECM effort:1.894 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.894


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-05-23T00:00:00ANONYMOUSv4_computers2027922F6184AB190.689
2000-08-31T00:00:00ANONYMOUSv4_computers2027922F6184AB190.689


PRP results:
dateuseridcompidcofactorsres64PRP
2022-11-02T06:59:36Funky Waddlemain
193897362103688503961268798894730360279
54A4A9D7E4DED3C2no


P-1 factor-bounds graph:
B1 = 7000000, B2 = 8975658510 (P-1 stage 2)
B1 = 7000000 (P-1 stage 1)
B1 = 1200000, B2 = 43100000 (P-1 stage 2)
B1 = 1200000 (P-1 stage 1)
B1 = 75000, B2 = 1500000 (P-1 stage 2)
B1 = 75000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
103
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106
107
103
104
105
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109
1010
TF factor-bounds graph:
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270
269
268
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250
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Last modified: 2022-11-02T06:59:36+00:00