is 2 1842497 - 1
has 554647 decimal digits
takes 0.100 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5981BE0331206F43double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.127068.6567%10000001883290500.88158.2207%17.008571.2334%2.5766%
PrimeNet2570.010463.1579%80001500000.00122.8828%0.011764.2200%1.0621%
GPU722610.166765.5738%90001400000.00131.5968%0.168066.1235%0.5497%
Difference+6+15.9603+3.0829%+991000+188189050+0.8802+6.6239%+16.8405+5.1099%+5.1099%

Known prime factors (2 factors, 160.1 bits, 0.00869137% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1842497863567836256473241468712376.19323434714853171355
3 × 5 × 283 × 5231 × 6007 × 175687
2011-02-0760071756878,656.70.00120.0014
1842497186260203859706762570844092683.9465054559216642055932
22 × 3 × 7 × 60173324007643523
2021-03-017601733240076435231,604,458257,887,823481,662,637

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1842497160848321227816574788391350351934272552576023423949160.138
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:35:00Carsten Kossendeyleela2376.193-0.200-0.000%
2022-04-03T12:49:06Jocelyn LaroucheManual testing1000000188329050-
skipped known factor: 86356783625647324146871
--0.882--8.221%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-16T00:00:00ANONYMOUSv4_computers21258--0.021--
2010-04-09T12:50:00Architects CubedManual testing260261--0.083--
2011-01-21T16:11:00GrunwalderGIMPManual testing21263--0.866--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.813 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:19.813 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110008.8210.015%
25500000.79944.960%
302500000.04995.175%
3510000000.00299.773%


ECM Summary

B1B2factorcurvesGHz-days
500005000000292.005
50000500000050.346
50000660000021716.91
50000675000070.551


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-01T00:00:00ANONYMOUSv4_computers5981BE0331206F430.100


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T04:29:19Oliver KruseGTX-1
86356783625647324146871
7B3AE4EC68F587__no
2017-11-06T15:23:31kkmrkkblmbrbkc4.xlarge
86356783625647324146871
7B3AE4EC68F587__no
2021-03-02T23:15:26-Anonymous-
86356783625647324146871
18626020385970676257084409
18059E0D91FD20__no
2021-03-15T12:42:21Anton RepkoDeskMini
86356783625647324146871
18626020385970676257084409
18059E0D91FD20BFno


P-1 factor-bounds graph:
B1 = 1000000, B2 = 188329050 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
100
101
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106
100
101
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1016
1017
TF factor-bounds graph:
267
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261
258
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260
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2100
Last modified: 2022-04-03T12:49:06+00:00