is 2 1002647 - 1
has 301827 decimal digits
takes 0.030 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB5D6BD5740A5B9DAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26729.635570.1493%1000000011100000003.005411.7613%32.640973.6601%3.5108%
PrimeNet2560.009664.2857%4500600000.00031.9398%0.009964.9785%0.6928%
GPU722600.153266.6667%4500160000.00020.5774%0.153466.8591%0.1925%
Difference+7+29.4823+3.4826%+9995500+1109984000+3.0052+11.1840%+32.4875+6.8010%+6.8010%

Known prime factors (2 factors, 137.9 bits, 0.01375136% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10026473250419079488718395532168.139162091896723808
25 × 5065371772619
2016-12-30325065371772619100.8511,86022,152
10026479848290872693883764232169.738491114563385413
11 × 8783 × 5083317601
2009-10-0987835083317601193.7411.90322.230

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
100264732011072552958800827877228106268802405891942137.878
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-10-22T00:00:00ANONYMOUSv4_computers500001000000---0.004--1.702%
2003-11-16T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.223%
2006-01-15T00:00:00Jocelyn Larouchev4_computers6000060000---0.003--0.580%
2006-01-15T00:00:00Jocelyn Larouchev4_computers7800078000---0.003--0.687%
2006-01-15T00:00:00Jocelyn Larouchev4_computers9800098000---0.004--0.790%
2009-06-05T23:23:00Rob_Deetwopc200000400000---0.009--1.613%
2009-06-06T15:36:00Rob_Deetwopc400000600000---0.018--1.961%
2009-06-06T19:50:00Rob_Deetwopc600000800000---0.026--2.215%
2016-03-17T18:58:55alpertronManual testing3000001000000012---0.036--4.066%
2021-05-25T07:43:34ViliamF3100000001110000000---3.005--11.761%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-09-22T00:00:00ANONYMOUSv4_computers256257--0.010--
2002-12-09T00:00:00ANONYMOUSv4_computers21258--0.038--
2022-03-07T17:30:11LordJuliusManual testing258260--0.115--
2009-02-17T03:54:00Sturle Sundezumthor.ifi260261--0.153--
2022-04-11T22:45:03LordJuliusManual testing21261--0.306--
2022-04-11T22:45:03LordJuliusManual testing261262--0.306--
2022-04-11T22:45:03LordJuliusManual testing262263--0.979--
2022-04-11T22:45:03LordJuliusManual testing263264--1.958--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.353 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000323 / 1003.2303.892%
2550000323 / 2801.15431.486%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:17.353 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.7310.000%
25500001.61319.937%
302500000.13187.717%
3510000000.00999.131%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002568.902
500005000000230.800
25000025000000447.651


Lucas-Lehmer results:
No L-L results for M1002647


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T15:59:47Oliver KruseGTX-0
325041907948871839553
984829087269388376423
B8AF8B0E81FA4F36no
2017-10-05T21:00:54Oliver KruseManual testing
325041907948871839553
984829087269388376423
B8AF8B0E81FA4F__no
2017-10-15T14:11:08Oliver KruseThreadripper
325041907948871839553
984829087269388376423
B8AF8B0E81FA4F__no
2017-12-25T05:09:05ATHec2-1xf
325041907948871839553
984829087269388376423
B8AF8B0E81FA4F__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 1110000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 600000, B2 = 800000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 400000, B2 = 600000 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 200000, B2 = 400000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 50000, B2 = 1000000 (P-1 stage 2)
B1 = 98000 (P-1 stage 1)
B1 = 78000 (P-1 stage 1)
B1 = 60000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-11T22:45:03+00:00