is 2 2645549 - 1
has 796390 decimal digits
takes 0.204 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L6CF7CA10232A8895double-checked
PRP334457BC365CFC__
unverified PRP test

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26822.530267.6471%2000000500000000.51696.8567%23.047169.8654%2.2183%
PrimeNet2590.029062.7119%110002000000.00242.7035%0.031463.7200%1.0081%
GPU722630.603365.0794%130002000000.00261.5742%0.605965.6291%0.5497%
Difference+5+21.9270+2.5677%+1987000+49800000+0.5143+5.2825%+22.4412+4.2363%+1.6686%

Known prime factors (1 factor, 72.0 bits, 0.00272295% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
264554948446842648449851987692272.037915629282399416
23 × 13 × 167 × 52719327637
2021-06-0516752719327637545.87321.68600.80

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-31T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.239%
2009-06-22T06:25:00harleeP4_260030000420000---0.006--1.206%
2011-01-19T17:19:00James Heinrichi7-9201800004275000---0.045--3.228%
2016-12-28T03:20:11Jocelyn Larouchelow 4M171988171988---0.019--1.126%
2016-12-29T21:56:28Jocelyn Larouchelow 4M206385206385---0.023--1.238%
2017-05-08T05:55:48Jocelyn Larouchelow 4M36000036000006---0.060--3.422%
2019-11-28T06:13:09masserManual testing20000005000000012---0.517--6.857%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-04-23T00:00:00Phantomasv4_computers21259--0.029--
2016-02-23T16:29:18Mark RoseManual testing259260--0.029--
2009-01-27T05:35:00Sturle Sundeginjtje.ifi260261--0.058--
2012-06-07T15:06:00Grant McCrackenthumper261262--0.116--
2013-01-23T08:31:00dbaughManual testing262263--0.371--
2015-02-23T17:25:00VictordeHollanderManual testing263264--0.742--
2015-02-23T17:25:00VictordeHollanderManual testing264265--1.412--
2016-01-21T23:03:49ramgeisManual testing265266--2.825--
2017-09-08T08:21:16Gordon SpenceManual testing266267--5.649--
2019-02-25T14:14:29TJAOIManual testing267268--11.30--


ECM factoring results:
Total ECM effort:10.227 GHz-days
Estimated T-Level:21.754
DigitsB1CompleteFacMiss
20110003.7922.256%
25500000.35170.415%
302500000.02297.810%
3510000000.00199.897%


ECM Summary

B1B2factorcurvesGHz-days
500005000000909.293
50000500000010.103
50000675000070.831


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-06T00:00:00Phantomasv4_computers6CF7CA10232A88950.204
2018-07-14T11:19:10kkmrkkblmbrbkold6CF7CA10232A88950.204


PRP results:
dateuseridcompidcofactorsres64PRP
2021-06-07T23:25:14LaurVtrabi
4844684264844985198769
334457BC365CFC__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 50000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 360000, B2 = 3600000 (P-1 stage 2)
B1 = 180000, B2 = 4275000 (P-1 stage 2)
B1 = 360000 (P-1 stage 1)
B1 = 206385 (P-1 stage 1)
B1 = 180000 (P-1 stage 1)
B1 = 171988 (P-1 stage 1)
B1 = 30000, B2 = 420000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-06-07T23:25:14+00:00