is 2 2944813 - 1
has 886478 decimal digits
takes 0.251 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP7A543900CEA445BDverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26820.240667.6471%1000000200000000.25125.5426%20.491869.4403%1.7932%
PrimeNet2590.026162.7119%130002600000.00333.0727%0.029363.8576%1.1457%
GPU722630.542065.0794%170003000000.00401.9470%0.546065.7593%0.6799%
Difference+5+19.6987+2.5677%+983000+19700000+0.2472+3.5956%+19.9458+3.6810%+3.6810%

Known prime factors (1 factor, 68.9 bits, 0.00233883% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
29448135410189621411233417912168.87491859646459915
33 × 5 × 43 × 15824228503
2020-09-14431582422850326.107106.40198.72

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.246%
2003-12-23T00:00:00Team Prime Ribv4_computers1000010000---0.001--0.146%
2010-11-05T09:23:00markrtiny1050002310000---0.028--2.592%
2015-04-29T15:00:00VictordeHollanderManual testing100000020000000---0.251--5.543%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:25Mark RoseManual testing21260--0.052--
2009-02-13T04:50:00Sturle Sundewright.ifi260261--0.052--
2011-12-23T21:53:00markroldgamer261262--0.104--
2013-01-07T13:49:00dbaughManual testing262263--0.333--
2015-04-27T09:54:00VictordeHollanderManual testing263264--0.667--
2015-04-27T09:54:00VictordeHollanderManual testing264265--1.269--
2016-02-24T09:33:38ramgeisManual testing265266--2.538--
2017-11-28T10:01:34Gordon SpenceManual testing266267--5.075--
2018-12-24T00:53:30chuenkitManual testing267268--10.15--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.200 GHz-days
Estimated T-Level:0.950
DigitsB1CurvesCompleteFacMiss
201100019 / 1000.19082.617%
255000019 / 2800.06893.428%

New Calculation Method

Total ECM effort:2.200 GHz-days
Estimated T-Level:0.950
DigitsB1CompleteFacMiss
20110000.61354.178%
25500000.05594.611%
302500000.00399.659%


ECM Summary

B1B2factorcurvesGHz-days
500005000000182.084
50000500000010.116


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-09T00:00:00ANONYMOUSv4_computersDD5817FAFB5117__0.251


PRP results:
dateuseridcompidcofactorsres64PRP
2020-09-14T02:42:49ATHec2-PRPCF
541018962141123341791
7A543900CEA445BDno


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 105000, B2 = 2310000 (P-1 stage 2)
B1 = 105000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2020-09-14T02:42:49+00:00