is 2 500000489 - 1
has 150515146 decimal digits
takes 12,093.762 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
Actual2821,958.931664.6341 %66000006600000231.47442.3169 %2,190.406065.4535 %
Target2821,958.931664.6341 %30000006500000001,341.51134.4260 %3,300.442966.1994 %
Difference---+3600000-643400000-1,110.0369-2.1091 %-1,110.0369-0.7459 %

Known prime factors (1 factor, 82.1 bits, 0.00001642% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
50000048952184033783003246632621372582.1105218398274706812
22 × 13 × 2939 × 36563 × 933883
2015-08-29365639338831,958.92.99693.3329

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-11-04Rob_Deetwopc30003000--0.1100.007%
2009-11-05Rob_Deetwopc40004000--0.1460.010%
2009-11-06Rob_Deetwopc50005000--0.1830.014%
2015-08-29Craig MeyersManual testing6600000660000012582.110242.12.317%


Trial Factoring results:
5758596061626364656667686970717273747576777879808182
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2023-10-18James HeinrichManual testing267268
2009-04-28unconnectedManual testing2682690.120
2009-04-28unconnectedManual testing2692700.239
2009-04-28unconnectedManual testing2702710.478
2009-05-12unconnectedireland-E53352712720.957
2015-04-10Craig MeyersManual testing2722731.913
2015-04-10Craig MeyersManual testing2732743.826
2015-04-10Craig MeyersManual testing2742757.652
2015-04-10Craig MeyersManual testing27527615.30
2015-04-10Craig MeyersManual testing27627730.61
2015-04-11Craig MeyersManual testing27727861.22
2015-04-11Craig MeyersManual testing278279122.4
2015-06-22Craig MeyersManual testing279280244.9
2015-06-24Craig MeyersManual testing280281489.7
2015-07-01Craig MeyersManual testing281282979.5


ECM factoring results:
No ECM results for M500000489


Lucas-Lehmer results:
No L-L results for M500000489


PRP results:
No PRP results for M500000489


CERT results:
No CERT results for M500000489


P-1 factor-bounds graph:
B1 = 6600000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 4000 (P-1 stage 1)
B1 = 3000 (P-1 stage 1)
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107
TF factor-bounds graph:
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this exponent TF target: 82
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00