is 2 2633359 - 1
has 792721 decimal digits
takes 0.203 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LDCD9A8AC06F1918Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27090.739968.5714%2000000600000000.57795.9512%91.317770.4418%1.8704%
PrimeNet2590.029262.7119%110002000000.00242.7012%0.031563.7191%1.0072%
GPU722630.606165.0794%130002000000.00261.5728%0.608765.6286%0.5492%
Difference+7+90.1338+3.4921%+1987000+59800000+0.5753+4.3784%+90.7091+4.8132%+4.8132%

Known prime factors (1 factor, 66.4 bits, 0.00252307% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
26333591001982833224011272632166.44119024805072609
7 × 31 × 87671912777
2014-03-28318767191277710.656534.94999.13

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-31T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.154%
2009-06-20T21:44:00harleeP4_260030000420000---0.006--0.903%
2011-01-18T05:29:00James Heinrichi7-9201800004275000---0.045--2.582%
2019-07-04T12:46:48alpertronManual testing20000006000000012---0.578--5.951%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-04-13T00:00:00ANONYMOUSv4_computers21259--0.029--
2022-03-11T04:28:50LordJuliusManual testing21260--0.058--
2009-01-27T03:32:00Sturle Sundeherrick.ifi260261--0.058--
2012-06-08T16:05:00lycornManual testing261264--1.235--
2013-10-22T10:24:00David CampeauManual testing264265--1.419--
2014-03-08T13:56:00Never Odd Or EvenManual testing265266--2.838--
2014-03-08T13:56:00Never Odd Or EvenManual testing266267--5.675--
2014-03-28T12:57:00Never Odd Or EvenManual testing26626766.441215.0480.41310.25
2014-03-08T13:56:00Never Odd Or EvenManual testing267268--11.35--
2014-03-08T13:56:00Never Odd Or EvenManual testing268269--22.70--
2014-03-08T13:56:00Never Odd Or EvenManual testing269270--45.40--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.929 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:0.929 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.29074.802%
25500000.02697.410%
302500000.00299.839%


ECM Summary

B1B2factorcurvesGHz-days
50000500000090.929


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-23T00:00:00ANONYMOUSv4_computersDCD9A8AC06F1918E0.203


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-17T19:27:36Oliver KruseGTX-0
100198283322401127263
2F30945B9EB5B8__no
2017-12-02T23:19:53kkmrkkblmbrbkc4.xlarge
100198283322401127263
2F30945B9EB5B8__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 180000, B2 = 4275000 (P-1 stage 2)
B1 = 180000 (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: 2022-03-11T04:28:50+00:00