is 2 1363771 - 1
has 410536 decimal digits
takes 0.052 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L96791205E7BAF1B3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26721.788168.6567%500000150000000.07144.8917%21.859570.1899%1.5332%
PrimeNet2560.007062.5000%60001000000.00062.6183%0.007763.4819%0.9819%
GPU722600.112665.0000%5500500000.00041.0672%0.113165.3735%0.3735%
Difference+7+21.6754+3.6567%+494500+14950000+0.0710+3.8245%+21.7464+4.8164%+4.8164%

Known prime factors (1 factor, 75.1 bits, 0.00550770% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1363771408388901349447866755612375.11214972781403529180
22 × 5 × 7 × 11 × 41 × 59 × 4019258093
2014-03-105940192580939,351.512.12322.643

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers15000225000---0.001--0.808%
unknown50000015000000---0.071--4.892%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-03T00:00:00ANONYMOUSv4_computers21257--0.014--
2003-06-30T00:00:00ANONYMOUSv4_computers21258--0.028--
2022-03-07T17:32:37LordJuliusManual testing258260--0.084--
2009-02-25T20:23:00Sturle Sundehindemith.ifi260261--0.113--
2011-05-09T14:44:00XyzzyManual testing261262--0.225--
2013-01-23T08:20:00dbaughManual testing262263--0.720--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.154 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000299 / 1002.9904.954%
2550000299 / 2801.06834.309%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.154 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.1990.001%
25500001.35125.899%
302500000.11389.347%
3510000000.00899.238%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000024911.66
250000350000005013.49


Lucas-Lehmer results:
No L-L results for M1363771


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T09:23:27Oliver KruseGTX-2
40838890134944786675561
303136A46D7BF8__no
2017-10-24T03:28:47kkmrkkblmbrbkold
40838890134944786675561
303136A46D7BF8__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 15000, B2 = 225000 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
100
101
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103
104
105
106
100
101
102
103
104
105
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109
1010
TF factor-bounds graph:
267
263
262
261
260
258
257
250
260
270
280
290
2100
Last modified: 2022-03-07T17:32:37+00:00