is 2 1187047 - 1
has 357337 decimal digits
takes 0.036 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L824457244418F62Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26725.031868.6567%300000100000000.03684.1554%25.068669.9592%1.3024%
PrimeNet2560.008162.5000%5000800000.00042.2649%0.008563.3494%0.8494%
GPU722600.129465.0000%5000280000.00030.8009%0.129765.2803%0.2803%
Difference+7+24.9024+3.6567%+295000+9972000+0.0366+3.3546%+24.9390+4.6789%+4.6789%

Known prime factors (2 factors, 157.1 bits, 0.01323424% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1187047392924622218925058972065.09116550508203084
22 × 4137627050771
2007-10-174413762705077111.92910,02418,722
118704749713777546670926620223226792892.0062094010496074330949837
79 × 131 × 120929 × 292849 × 5713553
2014-12-2429284957135531.188e+90.02620.0265

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
118704719533767261601352881667343479597936099564433806348157.097
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-05-05T00:00:00Jocelyn Larouchev4_computers10001000---4.44667e-5--0.005%
2002-08-31T00:00:00Jocelyn Larouchev4_computers20002000---8.89333e-5--0.018%
2002-08-31T00:00:00Jocelyn Larouchev4_computers30003000---0.000--0.034%
2002-08-31T00:00:00Jocelyn Larouchev4_computers40004000---0.000--0.049%
2002-09-14T00:00:00Jocelyn Larouchev4_computers50005000---0.000--0.065%
2002-09-22T00:00:00Jocelyn Larouchev4_computers80008000---0.000--0.111%
2002-09-29T00:00:00Jocelyn Larouchev4_computers1000010000---0.000--0.139%
2003-09-21T00:00:00ANONYMOUSv4_computers100001000000---0.003--0.990%
2014-12-24T12:03:00alpertronManual testing30000010000000122892.0060.0370.0730.0744.155%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-03T00:00:00ANONYMOUSv4_computers21257--0.016--
2003-05-11T00:00:00ANONYMOUSv4_computers21258--0.032--
2022-04-12T20:41:58LordJuliusManual testing21261--0.259--
2022-04-12T20:41:58LordJuliusManual testing261262--0.259--
2022-04-12T20:41:58LordJuliusManual testing262263--0.827--
2022-04-12T20:41:58LordJuliusManual testing263264--1.654--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.445 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000325 / 1003.2503.815%
2550000325 / 2801.16131.261%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:18.445 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000028110.35
25000025000000448.099


Lucas-Lehmer results:
No L-L results for M1187047


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-29T11:20:44Oliver KruseGTX-1
39292462221892505897
4971377754667092662022322679
D01705104344AD8Fno
2017-10-05T21:15:39Oliver KruseManual testing
39292462221892505897
4971377754667092662022322679
D01705104344AD__no
2017-10-17T17:53:26Oliver KruseThreadripper
39292462221892505897
4971377754667092662022322679
D01705104344AD__no
2018-01-03T01:45:18ATHec2-8x
39292462221892505897
4971377754667092662022322679
D01705104344AD__no


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 10000, B2 = 1000000 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 8000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 4000 (P-1 stage 1)
B1 = 3000 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-12T20:41:58+00:00