is 2 247000007 - 1
has 74354412 decimal digits
takes 2,596.931 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
Actual279495.680964.5570 %2020000202000030.79521.8643 %526.476165.2177 %
Target279495.680964.5570 %1500000300000000270.80104.3092 %766.481966.0843 %
Difference---+520000-297980000-240.0058-2.4449 %-240.0058-0.8665 %

Known prime factors (1 factor, 100.1 bits, 0.00004054% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
247000007139608361324950487429994713425731100.1392826080108672840795304
23 × 32 × 1559 × 47269 × 307301 × 1733267
2019-10-153073011733267519,759,8715.86929.534

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-10-15KrieselKilroy_was_here20200002020000131100.13930.801.864%


Trial Factoring results:
5758596061626364656667686970717273747576777879
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2009-06-22rudimeierclyde2672680.121
2009-07-03rudimeierhomer2682690.242
2009-07-24rudimeierbart2692700.484
2009-08-23rudimeierbart2702710.968
2009-11-29rudimeierdickie2712721.936
2010-01-21rudimeierhomer2722733.873
2010-05-15rudimeierhomer2732747.745
2010-06-03rudimeierbonnie27427515.49
2019-10-14KrieselManual testing27527630.98
2019-10-14KrieselManual testing27627761.96
2019-10-14KrieselManual testing277278123.9
2019-10-14KrieselManual testing278279247.8


ECM factoring results:
No ECM results for M247000007


Lucas-Lehmer results:
No L-L results for M247000007


PRP results:
No PRP results for M247000007


CERT results:
No CERT results for M247000007


P-1 factor-bounds graph:
B1 = 2020000 (P-1 stage 1)
104
105
106
107
104
105
106
107
TF factor-bounds graph:
279
278
277
276
275
274
273
272
271
270
269
268
this exponent TF target: 79
TF double-checked to: 67
250
260
270
280
290
2100
2110
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00