is 2 51702251 - 1
has 15563929 decimal digits
takes 99.048 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
Actual27473.998064.8649%----73.998064.8649%
Target27336.997364.3836%3400008800000014.21123.8024%51.208565.7378%
Difference+1+37.0007+0.4813%-340000-88000000-14.2112-3.8024%+22.7895-0.8730%

Known prime factors (7 factors, 308.5 bits, 0.00059673% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
51702251103404503926.6241
1		-111.730e-132.778e-65.653e-6
517022512891189875931238.0732796
22 × 3 × 233		2008-09-1042331.137e-94.577e-56.678e-5
5170225112346497538811340.16711940
22 × 3 × 5 × 199		2008-09-1051994.489e-94.325e-55.638e-5
5170225127819947218091341.33926904
23 × 3 × 19 × 59		2008-09-1019591.033e-85.883e-50.0001
51702251114494634839511443.380110725
52 × 43 × 103		2008-09-30431034.457e-80.00010.0002
5170225136432641581467591651.69435233129
17 × 1103 × 1879		2014-07-09110318797.069e-60.00320.0062
517022511749164705505816800472167.2451691575000773
3 × 7 × 130253 × 618421		2019-06-171302536184210.60890.43570.7364

120 Composite Factors:
P-1 results:
No P-1 results for M51702251


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-10Will EdgingtonManual testing??40.167131.65568e-9237.73.97255e-9
2008-09-10Will EdgingtonManual testing??41.339134.66533e-9237.71.11938e-8
2008-09-10Will EdgingtonManual testing??38.073124.28637e-10237.71.02845e-9
2008-09-30markrManual testing??43.380142.19040e-8237.75.25554e-8
2014-07-09TJAOIManual testing??51.694161.26717e-6237.73.04038e-6
2021-08-06Seth_TrManual testing266267--0.289--
2019-06-18Seth_TrManual testing26726867.245210.034236.50.082
2021-08-06Seth_TrManual testing267268
skipped known factors(?)
--0.578--
2019-12-08Seth_TrManual testing268269--1.156--
2019-12-11Seth_TrManual testing269270--2.313--
2019-12-22Seth_TrManual testing270271--4.625--
2022-12-31LordJuliusManual testing271272--9.250--
2022-12-31LordJuliusManual testing272273--18.50--
2022-12-31LordJuliusManual testing273274--37.00--


ECM factoring results:
No ECM results for M51702251


Lucas-Lehmer results:
No L-L results for M51702251


PRP results:
No PRP results for M51702251


P-1 factor-bounds graph:
100
101
102
103
104
105
106
100
101
102
103
104
105
106
TF factor-bounds graph:
274
273
272
271
270
269
268
267
2
this exponent TF target: 73
TF double-checked to: 67.8
250
260
270
280
Last modified: 2023-06-05T21:50:05+00:00