is 2 2915509 - 1
has 877656 decimal digits
takes 0.225 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L20DC00A3C3C6FF71double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26710.191767.1642%20482048000.00150.3039%10.193167.2640%0.0998%
PrimeNet2590.026362.7119%130002600000.00303.0672%0.029363.8556%1.1437%
GPU722630.547465.0794%160003000000.00351.9109%0.550965.7467%0.6673%
Difference+4+9.6443+2.0848%-13952-95200-0.0021-1.6070%+9.6422+1.5173%+1.5173%

Known prime factors (1 factor, 64.4 bits, 0.00220774% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2915509237875279589976240792064.3674079481140171
4079481140171
2009-03-28140794811401712.239124,89246,491

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-02T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.304%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-05-23T00:00:00BJBv4_computers21259--0.026--
2022-03-10T18:31:20LordJuliusManual testing21260--0.053--
2009-02-12T23:42:00Sturle Sundekrebs.ifi260261--0.053--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.315 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.315 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000030.315


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-05T00:00:00BCGv4_computers20DC00A3C3C6FF710.225
1999-08-16T00:00:00Phantomasv4_computers20DC00A3C3C6FF710.225


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-24T18:45:28Oliver KruseGTX-1
23787527958997624079
A9A45CA30AFCDB__no
2017-12-08T20:22:03kkmrkkblmbrbkc4.xlarge
23787527958997624079
A9A45CA30AFCDB__no


P-1 factor-bounds graph:
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
100
101
102
103
104
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
261
260
259
250
260
270
280
290
2100
Last modified: 2022-03-10T18:31:20+00:00