is 2 1965109 - 1
has 591557 decimal digits
takes 0.107 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2CDFFA8F88E62DC4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.120768.6567%----15.120768.6567%0.0000%
PrimeNet2580.019563.7931%80001400000.00122.4704%0.020764.6876%0.8945%
GPU722620.312666.1290%8000900000.00101.1550%0.313666.5202%0.3912%
Difference+5+14.8081+2.5277%-8000-90000-0.0010-1.1550%+14.8071+2.1365%+2.1365%

Known prime factors (1 factor, 74.7 bits, 0.00379923% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1965109298284198148245238681612374.6597589507710469120
210 × 5 × 571 × 6491 × 399941
2009-08-2064913999413,169.00.00220.0032

P-1 results:
No P-1 results for M1965109


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


ECM factoring results:

Old Calculation Method

Total ECM effort:21.861 GHz-days
Estimated T-Level:24.696
DigitsB1CurvesCompleteFacMiss
2011000263 / 1002.6307.113%
2550000263 / 2800.93939.025%

New Calculation Method

Total ECM effort:21.861 GHz-days
Estimated T-Level:24.696
DigitsB1CompleteFacMiss
201100010.9200.002%
25500001.03035.695%
302500000.06693.647%
3510000000.00399.692%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000070.293
500005000000251.741
50000648736570.546
50000675000070.556
50000704819070.568
50000750000021718.16


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00ANONYMOUSv4_computers2CDFFA8F88E62DC40.107


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T09:17:07Oliver KruseGTX-2
29828419814824523868161
2383BEFF552E86__no
2017-11-12T00:01:18kkmrkkblmbrbkc4.xlarge
29828419814824523868161
2383BEFF552E86__no


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2022-06-24T08:50:40+00:00