is 2 51349849 - 1
has 15457845 decimal digits
takes 94.070 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2704.653462.8571 %610000173850004.04815.9387 %8.701565.0630 %
Target27337.251264.3836 %340000550000008.81373.7991 %46.065065.7367 %
Difference-3-32.5978-1.5264 %+270000-37615000-4.7656+2.1397%-37.3635-0.6737 %

Known prime factors (1 factor, 71.5 bits, 0.00013915% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5134984932306928477099050779432271.45231457666484179
13 × 157 × 15412869419
2012-02-061571541286941914.1462,230.64,166.2

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-11-17TheJudgerSinope61000017385000--4.6834.481%
2012-02-06Craig MeyersManual testing2271.4522.4590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-10-15ANONYMOUSv4_computers212532.34000e-5
2000-02-16ANONYMOUSv4_computers212544.67000e-5
2000-04-12ANONYMOUSv4_computers212560.000
2001-05-06ANONYMOUSv4_computers212570.000
2002-02-10ANONYMOUSv4_computers212580.001
2003-10-14apocalypsev4_computers212600.001
2022-04-05LordJuliusManual testing260263
2008-11-27Charlie Brownunife_32632640.038
2008-11-28usmfunsigna022642650.073
2008-12-01Cyber-ertMandriva2652660.146
2008-12-07Cyber-ertMandriva2662670.291
2009-04-15Sturle Sundebruckner.ifi2672680.582
2009-11-20subgeniusHDO-c12682691.164
2011-12-16LaurVManual testing2692702.328


ECM factoring results:
No ECM results for M51349849


Lucas-Lehmer results:
No L-L results for M51349849


PRP results:
No PRP results for M51349849


CERT results:
No CERT results for M51349849


P-1 factor-bounds graph:
B1 = 610000, B2 = 17385000 (P-1 stage 2)
B1 = 610000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 73
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00