is 2 5544977 - 1
has 1669205 decimal digits
takes 0.876 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L180AFDBC18850A7Bdouble-checked
PRP2F0AB61EB0C4B6A2PRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272172.468568.0556%8000000405249537052.288610.9226%224.757171.5447%3.4892%
PrimeNet2620.110862.9032%240005500000.01213.1656%0.122964.0775%1.1743%
GPU722662.663465.1515%340007000000.01612.1566%2.679565.9030%0.7515%
Difference+6+169.8051+2.9040%+7966000+4051795370+52.2725+8.7660%+222.0776+5.6417%+2.7376%

Known prime factors (1 factor, 130.2 bits, 0.00234855% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5544977159245110765120879284870198984264352100940130.226143594022811204518327912089612152
23 × 41 × 373 × 773 × 4801 × 46919 × 1803449 × 3737574641
2021-12-28180344937375746412.960e+1047.01887.088

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-12-07T00:00:00lozcsv4_computers25000300000---0.009--0.656%
2000-12-21T00:00:00ANONYMOUSv4_computers2000060000---0.005--0.323%
2001-09-10T00:00:00vidmarv4_computers25000206250---0.008--0.578%
2009-06-01T12:58:00Rob_Deetwopc100000500000---0.028--1.125%
2009-06-03T02:10:00Rob_Deetwopc2000001000000---0.056--1.585%
2020-11-30T01:58:34Carlos PinhoHomeComputer237000801500012---0.151--2.771%
2020-11-30T22:49:33storm5510Manual testing3500008000000---0.176--2.959%
2021-11-17T05:26:02axnManual testing8000000400000000---6.722--8.209%
2021-12-27T19:02:39axnManual testing8000000405249537040130.22652.291.751104.610.923%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:39:10Mark RoseManual testing21262--0.111--
2009-04-23T19:20:00GrunwalderGIMPManual testing262263--0.177--
2014-12-12T22:08:00NesowaManual testing263264--0.354--
2014-12-13T00:51:00monstManual testing264265--0.674--
2015-09-01T10:23:00snme2pm1Manual testing265266--1.348--
2016-07-27T13:19:54Gordon SpenceManual testing266267--2.695--
2018-07-05T15:04:28ramgeisManual testing267268--5.391--
2020-08-17T13:26:51TJAOIManual testing268269--10.78--
2021-08-22T16:34:38SRBaseManual testing269270--21.56--
2021-09-06T18:10:33SRBaseManual testing270271--43.13--
2021-09-16T06:37:43SRBaseManual testing271272--86.25--


ECM factoring results:
Total ECM effort:2.161 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000092.161


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-07T00:00:00ANONYMOUSv4_computers7C507E0984E0D9__0.876
1999-05-02T00:00:00ANONYMOUSv4_computers180AFDBC18850A7B0.876
2001-09-30T00:00:00vidmarv4_computers180AFDBC18850A7B0.876


PRP results:
dateuseridcompidcofactorsres64PRP
2022-01-03T05:18:25Ember_EdisonMainServer
1592451107651208792848701989842643521009
2F0AB61EB0C4B6A2no


P-1 factor-bounds graph:
B1 = 8000000, B2 = 4052495370 (P-1 stage 2)
B1 = 8000000, B2 = 400000000 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 350000, B2 = 8000000 (P-1 stage 2)
B1 = 237000, B2 = 8015000 (P-1 stage 2)
B1 = 350000 (P-1 stage 1)
B1 = 200000, B2 = 1000000 (P-1 stage 2)
B1 = 237000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 100000, B2 = 500000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 25000, B2 = 300000 (P-1 stage 2)
B1 = 25000, B2 = 206250 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
B1 = 20000, B2 = 60000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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1010
TF factor-bounds graph:
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250
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Last modified: 2022-01-03T05:18:25+00:00