is 2 1963081 - 1
has 590947 decimal digits
takes 0.106 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2542C3565631232Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.136468.6567%----15.136468.6567%0.0000%
PrimeNet2580.019663.7931%80001400000.00122.4699%0.020864.6874%0.8943%
GPU722620.313066.1290%8000900000.00101.1548%0.313966.5202%0.3911%
Difference+5+14.8234+2.5277%-8000-90000-0.0010-1.1548%+14.8224+2.1366%+2.1366%

Known prime factors (1 factor, 70.8 bits, 0.00360747% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
196308120806362429023382353272270.818529941516142823
173 × 359 × 8532717989
2009-08-193598532717989130.2436.56968.301

P-1 results:
No P-1 results for M1963081


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-27T00:00:00ANONYMOUSv4_computers21258--0.020--
1999-03-26T00:00:00ANONYMOUSv4_computers21258--0.020--


ECM factoring results:

Old Calculation Method

Total ECM effort:20.276 GHz-days
Estimated T-Level:24.411
DigitsB1CurvesCompleteFacMiss
2011000247 / 1002.4708.354%
2550000247 / 2800.88241.324%

New Calculation Method

Total ECM effort:20.276 GHz-days
Estimated T-Level:24.411
DigitsB1CompleteFacMiss
201100010.2150.004%
25500000.96638.073%
302500000.06294.028%
3510000000.00399.710%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000241.671
50000670000070.554
50000700000070.566
50000750000020917.48


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-02T00:00:00ANONYMOUSv4_computers2542C3565631232E0.106
1999-03-26T00:00:00ANONYMOUSv4_computers2542C3565631232E0.106


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T08:58:32Oliver KruseGTX-0
2080636242902338235327
CB76CA97A03C99__no
2017-11-11T22:43:28kkmrkkblmbrbkc4.xlarge
2080636242902338235327
CB76CA97A03C99__no


P-1 factor-bounds graph:
101
102
103
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2022-06-01T10:42:12+00:00