is 2 1980673 - 1
has 596242 decimal digits
takes 0.130 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCC1BC3E9DE943B2Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.001968.6567%----15.001968.6567%0.0000%
PrimeNet2580.019463.7931%80001400000.00142.4742%0.020864.6889%0.8958%
GPU722620.310266.1290%80001000000.00121.1973%0.311466.5346%0.4055%
Difference+5+14.6918+2.5277%-8000-100000-0.0012-1.1973%+14.6905+2.1222%+2.1222%

Known prime factors (1 factor, 63.1 bits, 0.00318495% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
198067397728797309457452891963.0832467060370628
22 × 3 × 7 × 29369766317
2009-08-287293697663171.0221152.55284.93

P-1 results:
No P-1 results for M1980673


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-04-13T00:00:00ANONYMOUSv4_computers21258--0.019--


ECM factoring results:

Old Calculation Method

Total ECM effort:26.120 GHz-days
Estimated T-Level:24.661
DigitsB1CurvesCompleteFacMiss
2011000261 / 1002.6107.257%
2550000261 / 2800.93239.305%

New Calculation Method

Total ECM effort:26.120 GHz-days
Estimated T-Level:24.661
DigitsB1CompleteFacMiss
201100010.8310.002%
25500001.02335.945%
302500000.06593.681%
3510000000.00399.693%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000100.845
50000574928870.627
500006750000212.025
50000713563770.693
50000750000021621.93


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-13T00:00:00ANONYMOUSv4_computersCC1BC3E9DE943B2A0.130


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T12:52:57Oliver KruseGTX-0
9772879730945745289
E4A675FBCDFEC3__no
2017-11-12T15:47:57kkmrkkblmbrbkold
9772879730945745289
E4A675FBCDFEC3__no


P-1 factor-bounds graph:
100
101
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2022-08-02T10:17:04+00:00