is 2 1862611 - 1
has 560702 decimal digits
takes 0.101 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.952868.6567%500000150000000.10155.0794%16.054370.2488%1.5920%
PrimeNet2570.010363.1579%90001600000.00143.0269%0.011764.2731%1.1152%
GPU722610.164965.5738%100001500000.00141.6883%0.166366.1550%0.5812%
Difference+6+15.7879+3.0829%+490000+14850000+0.1001+3.3911%+15.8880+4.0938%+4.0938%

Known prime factors (3 factors, 182.8 bits, 0.00981385% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
186261111919816346731340.116319976
23 × 23 × 37 × 47
-37479.900e-82.953e-65.923e-6
18626113558158239751576895532168.27095515334113016
23 × 37 × 322686939571
2020-07-283732268693957134.4741,383.02,583.0
1862611250573592458141533209992374.4086726406975427009
13 × 517415921186693
2020-12-03135174159211866932,920.62,217,5154,141,701

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
186261142412592750442888773633079467116933108.386
18626112986791203441416490832383971739832735114.524
1862611891580492669089881740707470610928679782344743142.677
186261110627475730942604500964527455463178737055770013507
577831
56182.794
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:37:12alpertronManual testing5000001500000012-
skipped known factor: 1191981634673
--0.101--5.079%


Trial Factoring results:
No TF results for M1862611


ECM factoring results:

Old Calculation Method

Total ECM effort:20.346 GHz-days
Estimated T-Level:24.732
DigitsB1CurvesCompleteFacMiss
2011000265 / 1002.6506.972%
2550000265 / 2800.94638.747%

New Calculation Method

Total ECM effort:20.346 GHz-days
Estimated T-Level:24.732
DigitsB1CompleteFacMiss
20110009.0530.012%
25500000.82044.036%
302500000.05195.053%
3510000000.00299.767%


ECM Summary

B1B2factorcurvesGHz-days
500005000000302.076
50000500000030.208
50000500000050.346
50000660000022717.72


Lucas-Lehmer results:
No L-L results for M1862611


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T09:13:31Oliver KruseGTX-0
1191981634673
CF6990D3C989C5__no
2017-11-07T09:07:36kkmrkkblmbrbkc4.xlarge
1191981634673
CF6990D3C989C5__no
2020-07-28T03:24:36CrypticCluecruncher
1191981634673
355815823975157689553
2C7F80B8B187390Cno
2020-08-01T15:17:13nordisweet16
1191981634673
355815823975157689553
2C7F80B8B187390Cno
2020-12-04T03:43:51Yuji HASEGAWAvj20a
1191981634673
355815823975157689553
25057359245814153320999
2C7F80B8B187390Cno
2020-12-04T09:42:01Jinyuan WangManual testing
1191981634673
355815823975157689553
25057359245814153320999
2C7F80B8B187390Cno


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2021-08-13T08:33:18+00:00