is 2 1187413 - 1
has 357447 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-LBF853C1F05766060double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26725.024168.6567%300000100000000.03684.1556%25.060969.9592%1.3025%
PrimeNet2560.008162.5000%5000800000.00042.2651%0.008563.3494%0.8494%
GPU722600.129365.0000%5000280000.00030.8009%0.129665.2803%0.2803%
Difference+7+24.8947+3.6567%+295000+9972000+0.0366+3.3547%+24.9313+4.6789%+4.6789%

Known prime factors (1 factor, 68.7 bits, 0.00578599% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
11874134806831400627032419992168.704202407730108523
701 × 288741412423
2009-09-2570128874141242359.602699.521,306.5

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-04-07T00:00:00Jocelyn Larouchev4_computers15000217500---0.001--0.777%
unknown30000010000000---0.037--4.156%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-03T00:00:00ANONYMOUSv4_computers21257--0.016--
2003-05-11T00:00:00ANONYMOUSv4_computers21258--0.032--
2022-03-07T17:31:15LordJuliusManual testing258260--0.097--
2009-02-27T04:51:00Sturle Sundebach.ifi260261--0.129--
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--1.653--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.335 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000322 / 1003.2203.931%
2550000322 / 2801.15031.599%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:18.335 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.6920.000%
25500001.60920.008%
302500000.13187.737%
3510000000.00999.133%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000027810.24
25000025000000448.100


Lucas-Lehmer results:
No L-L results for M1187413


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-29T11:27:02Oliver KruseGTX-2
480683140062703241999
4385B569D7C9C8__no
2017-10-17T18:00:41Oliver KruseThreadripper
480683140062703241999
4385B569D7C9C8__no
2018-01-03T03:49:36ATHec2-8x
480683140062703241999
4385B569D7C9C8__no


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2022-04-12T20:41:58+00:00