is 2 790397 - 1
has 237934 decimal digits
takes 0.016 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF38A3D6082F23373double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26737.593770.1493%500000150000000.03744.5770%37.631071.5155%1.3663%
PrimeNet2400.000050.0000%70003000000.000722.2835%0.000761.1417%11.1417%
GPU722440.000054.5455%130005000000.001117.0955%0.001162.3161%7.7707%
Difference+23+37.5937+15.6038%+487000+14500000+0.0362-12.5185%+37.6299+9.1994%+9.1994%

Known prime factors (1 factor, 63.8 bits, 0.00806874% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
790397157841029983689113132063.7759984920867848
23 × 17 × 73418535793
2009-09-1417734185357932.2279115.84216.36

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-01-02T00:00:00ANONYMOUSv4_computers2000200000---0.000--0.203%
2002-02-03T00:00:00ANONYMOUSv4_computers4096409600---0.001--0.433%
2002-03-31T00:00:00ANONYMOUSv4_computers8192819200---0.002--0.782%
2002-05-18T00:00:00ANONYMOUSv4_computers163841638400---0.003--1.270%
2002-07-27T00:00:00ANONYMOUSv4_computers327683276800---0.006--1.906%
2002-12-09T00:00:00ANONYMOUSv4_computers655376553700---0.012--2.682%
2003-07-30T00:00:00ANONYMOUSv4_computers13107213107200---0.024--3.585%
unknown50000015000000---0.037--4.577%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-10-07T00:00:00ANONYMOUSv4_computers21255--0.006--
2001-02-11T00:00:00ANONYMOUSv4_computers21256--0.012--
2001-12-08T00:00:00ANONYMOUSv4_computers21257--0.024--
2003-09-21T00:00:00ANONYMOUSv4_computers21258--0.049--
2008-10-11T14:56:00Sturle Sundetristan.ifi258259--0.049--
2008-10-11T15:29:00Sturle Sundetristan.ifi259260--0.097--


ECM factoring results:

Old Calculation Method

Total ECM effort:11.362 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000322 / 1003.2203.931%
2550000322 / 2801.15031.599%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:11.362 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.6920.000%
25500001.60920.008%
302500000.13187.737%
3510000000.00999.133%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002786.343
25000025000000445.019


Lucas-Lehmer results:
No L-L results for M790397


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T00:42:16Oliver KruseGTX-1
15784102998368911313
6B4086F6C8AA6D__no
2017-10-13T21:50:22Oliver KruseThreadripper6B4086F6C8AA6D__no
2017-12-17T02:58:14ATHec2-1xf
15784102998368911313
6B4086F6C8AA6D__no
2020-04-21T06:12:45Oliver KruseAddPrpType5
15784102998368911313
5C3B735A59404F__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 65537, B2 = 6553700 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 16384, B2 = 1638400 (P-1 stage 2)
B1 = 65537 (P-1 stage 1)
B1 = 8192, B2 = 819200 (P-1 stage 2)
B1 = 32768 (P-1 stage 1)
B1 = 4096, B2 = 409600 (P-1 stage 2)
B1 = 16384 (P-1 stage 1)
B1 = 2000, B2 = 200000 (P-1 stage 2)
B1 = 8192 (P-1 stage 1)
B1 = 4096 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2020-04-21T06:12:45+00:00