is 2 2457383 - 1
has 739746 decimal digits
takes 0.170 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB9FB618DEB45DE7Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.091767.1642%2000000600000000.51907.6337%12.610769.6708%2.5066%
PrimeNet2590.031362.7119%100001800000.00192.5297%0.033263.6551%0.9433%
GPU722630.649565.0794%100001600000.00181.3342%0.651365.5453%0.4659%
Difference+4+11.4422+2.0848%+1990000+59840000+0.5171+6.2996%+11.9593+4.1255%+4.1255%

Known prime factors (1 factor, 64.8 bits, 0.00263558% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2457383313767923386906449132064.7666384188451432
23 × 3 × 11 × 24182532013
2010-03-1511241825320131.7091132.51247.49

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.289%
2003-10-31T00:00:00Team Prime Ribv4_computers15000232500---0.003--0.921%
2018-09-28T17:00:57alpertronManual testing20000006000000012---0.519--7.634%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-08-07T00:00:00ANONYMOUSv4_computers21259--0.031--
2022-03-10T05:52:56LordJuliusManual testing21260--0.063--
2009-01-10T19:43:00Sturle Sundegibus.ifi260261--0.063--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.275 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.275 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000030.275


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-03-23T00:00:00ANONYMOUSv4_computersB9FB618DEB45DE7A0.170
1999-09-14T00:00:00ANONYMOUSv4_computersB9FB618DEB45DE7A0.170


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-13T21:09:30Oliver KruseGTX-2DF08069D6E7F50__no
2017-11-28T23:35:36kkmrkkblmbrbkold
31376792338690644913
DF08069D6E7F50__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 15000, B2 = 232500 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
100
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102
103
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106
107
100
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1010
1011
TF factor-bounds graph:
267
261
260
259
250
260
270
280
290
2100
Last modified: 2022-03-10T05:52:56+00:00