is 2 1980101 - 1
has 596070 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-L83D7230B5D741DC6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271241.441470.4225%19801012475126251.46416.6168%242.905572.3796%1.9571%
PrimeNet2580.019463.7931%80001400000.00142.4741%0.020864.6889%0.8958%
GPU722620.310366.1290%80001000000.00121.1972%0.311566.5345%0.4055%
Difference+9+241.1311+4.2935%+1972101+247412625+1.4629+5.4196%+242.5940+5.8451%+5.8451%

Known prime factors (1 factor, 93.8 bits, 0.00473565% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1980101168965348065811355440904053932993.7714266584079948733813096
23 × 293 × 147400249 × 12348792241
2020-07-14147400249123487922411.819e+977.430119.80

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-26T00:08:00kurlyhex100000030000000---0.246--4.324%
2018-01-23T17:30:13Jocelyn Larouchelow 4M19801013000000012---0.334--4.647%
2018-02-15T13:14:29Jocelyn Larouchelow 4M19801016000000012---0.490--5.283%
2018-03-06T12:48:09Jocelyn Larouchelow 4M198010112000000012---0.802--5.930%
2018-05-27T12:18:59Jocelyn Larouchelow 4M198010119801010012---1.207--6.404%
2018-11-26T12:53:53Jocelyn LaroucheManual testing198010124751262512---1.464--6.617%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00ANONYMOUSv4_computers21258--0.019--
2016-02-23T16:29:02Mark RoseManual testing258260--0.058--
2009-12-20T13:02:00S485122USB-W260261--0.078--
2016-02-23T16:29:02Mark RoseManual testing261262--0.155--
2011-08-27T22:55:00GrunwalderGIMPManual testing21263--0.806--
2016-02-23T16:29:02Mark RoseManual testing262263--0.496--
2015-03-15T16:21:00lycornManual testing263264--0.992--
2015-03-15T17:06:00lycornManual testing264265--1.887--
2015-09-11T08:33:00ramgeisManual testing265266--3.774--
2018-02-27T18:06:12YxinityManual testing266267--7.548--
2018-02-27T18:06:12YxinityManual testing267268--15.10--
2018-02-27T18:06:12YxinityManual testing268269--30.19--
2018-02-27T18:06:12YxinityManual testing269270--60.38--
2018-06-15T12:19:13ramgeisManual testing270271--120.8--


ECM factoring results:

Old Calculation Method

Total ECM effort:10.391 GHz-days
Estimated T-Level:22.196
DigitsB1CurvesCompleteFacMiss
2011000123 / 1001.23029.049%
2550000123 / 2800.43964.399%

New Calculation Method

Total ECM effort:10.391 GHz-days
Estimated T-Level:22.196
DigitsB1CompleteFacMiss
20110003.9681.892%
25500000.35969.865%
302500000.02297.816%
3510000000.00199.899%


ECM Summary

B1B2factorcurvesGHz-days
50000500000012010.14
50000500000030.253


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02T00:00:00ANONYMOUSv4_computers83D7230B5D741DC60.130
2015-07-12T18:10:00MadPooManual testing83D7230B5D741DC60.130


PRP results:
dateuseridcompidcofactorsres64PRP
2020-07-15T16:05:27kotenok2000shodan1
16896534806581135544090405393
0B85430FCB192846no
2020-07-17T23:34:33argusdustyArgus-PC
16896534806581135544090405393
0B85430FCB192846no


P-1 factor-bounds graph:
B1 = 1980101, B2 = 247512625 (P-1 stage 2)
B1 = 1980101, B2 = 198010100 (P-1 stage 2)
B1 = 1980101, B2 = 120000000 (P-1 stage 2)
B1 = 1980101, B2 = 60000000 (P-1 stage 2)
B1 = 1980101, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1980101 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-07-17T23:34:33+00:00