is 2 3642559 - 1
has 1096520 decimal digits
takes 0.383 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L13EA3E43C41E2BAAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2678.157467.1642%1000001303648501.09615.9863%9.253569.1298%1.9657%
PrimeNet2600.042263.3333%160003200000.00503.0753%0.047164.4609%1.1276%
GPU722640.977265.6250%220004000000.00652.0355%0.983666.3247%0.6997%
Difference+3+7.1803+1.5392%+78000+129964850+1.0896+3.9508%+8.2699+2.8051%+2.8051%

Known prime factors (1 factor, 73.2 bits, 0.00200954% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3642559108386742239717882706732373.1991487782932818904
23 × 32 × 29 × 712539718783
2015-09-1029712539718783834.795,912.111,042

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-07T04:41:00Carsten Kossendeyleela20000245000---0.005--1.116%
2012-01-26T01:13:00Squeeky_SquirrelP4_2600900001620000---0.026--2.691%
2022-03-05T05:36:53Jocelyn LaroucheManual testing9000090000---0.014--0.956%
2022-03-22T11:10:30Jocelyn LaroucheManual testing100000100000---0.015--1.016%
2022-05-25T14:13:42Jocelyn LaroucheManual testing100000130364850---1.096--5.986%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-03-10T16:50:00S485122USB-Z260261--0.042--
2011-05-19T09:47:00markrManual testing21262--0.169--
2012-06-20T01:22:00GrunwalderGIMPManual testing21263--0.438--
2015-01-22T10:40:00VictordeHollanderManual testing263264--0.539--
2015-01-22T10:40:00VictordeHollanderManual testing264265--1.026--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.040 GHz-days
Estimated T-Level:0.350
DigitsB1CurvesCompleteFacMiss
20110007 / 1000.07093.207%
25500007 / 2800.02597.527%

New Calculation Method

Total ECM effort:1.040 GHz-days
Estimated T-Level:0.350
DigitsB1CompleteFacMiss
20110000.22679.787%
25500000.02097.980%
302500000.00199.874%


ECM Summary

B1B2factorcurvesGHz-days
50000500000060.891
50000500000010.149


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-30T00:00:00ANONYMOUSv4_computers13EA3E43C41E2BAA0.383


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-11T07:23:31Oliver KruseGTX-2
10838674223971788270673
AD1D23000253A8__no
2017-12-19T03:05:21kkmrkkblmbrbkc4.xlarge
10838674223971788270673
AD1D23000253A8__no


P-1 factor-bounds graph:
B1 = 100000, B2 = 130364850 (P-1 stage 2)
B1 = 90000, B2 = 1620000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 20000, B2 = 245000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-05-25T14:13:42+00:00