is 2 371999 - 1
has 111983 decimal digits
takes 0.004 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBC7B05E0DD141D__double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26779.876371.6418%6553665536000.00592.3804%79.882272.3168%0.6750%
PrimeNet2400.000052.5000%36001100000.000116.7460%0.000160.4544%7.9544%
GPU722440.000056.8182%65001900000.000212.5056%0.000262.2183%5.4001%
Difference+23+79.8763+14.8236%+59036+6363600+0.0057-10.1251%+79.8820+10.0985%+10.0985%

Known prime factors (1 factor, 59.4 bits, 0.01597940% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3719997837770672367921031859.4431053466631949
3 × 31 × 11327598193
2007-08-2931113275981930.31148.675416.203

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-06-15T00:00:00ANONYMOUSv4_computers327683276800---0.003--1.668%
2002-08-24T00:00:00ANONYMOUSv4_computers655366553600---0.006--2.380%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-11-24T00:00:00ANONYMOUSv4_computers252253--0.002--
2000-04-27T00:00:00ANONYMOUSv4_computers21254--0.006--
2022-03-07T06:37:15LordJuliusManual testing254255--0.006--
2001-03-17T00:00:00ANONYMOUSv4_computers21256--0.026--
2002-02-03T00:00:00ANONYMOUSv4_computers21257--0.052--
2004-01-18T00:00:00ANONYMOUSv4_computers21258--0.103--


ECM factoring results:

Old Calculation Method

Total ECM effort:10.506 GHz-days
Estimated T-Level:26.125
DigitsB1CurvesCompleteFacMiss
2011000425 / 1004.2501.396%
2550000425 / 2801.51821.859%
30250000144 / 6400.22579.838%

New Calculation Method

Total ECM effort:10.506 GHz-days
Estimated T-Level:26.125
DigitsB1CompleteFacMiss
201100023.8990.000%
25500003.0284.840%
302500000.28775.049%
3510000000.02297.832%
4030000000.00199.860%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002812.949
250000250000001447.556


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-01-02T00:00:00ANONYMOUSv4_computersBC7B05E0DD141D__0.004


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-23T04:24:00Oliver KruseOllaptop
783777067236792103
3E2FD9E44B8A06__no
2017-11-02T10:38:45kkmrkkblmbrbkc4.xlarge
783777067236792103
3E2FD9E44B8A06__no
2020-04-18T15:21:12Oliver KruseAddPrpType5
783777067236792103
9F414E17E70878__no


P-1 factor-bounds graph:
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
100
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103
104
105
100
101
102
103
104
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108
109
1010
1011
TF factor-bounds graph:
267
258
257
256
255
254
253
250
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290
2100
Last modified: 2022-03-07T06:37:15+00:00