is 2 4207225259 - 1
has 1266501002 decimal digits
takes 1,138,726.420 GHz-days to do one PRP test
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27929.100759.4937%----29.100759.4937%
Target292238,393.262365.2174%200000009600000000212,689.82294.2566%451,083.085266.6979%
Difference-13-238,364.1616-5.7237%-20000000-9600000000-212,689.8229-4.2566%-451,053.9845-7.2043%

Known prime factors (6 factors, 301.8 bits, 0.00000717% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
420722525984144505191032.9701
1
2012-08-20111.363e-130.00040.0008
4207225259322441743849771444.8743832
23 × 479
2019-07-1384796.260e-100.01320.0191
420722525922074890211447111650.971262345
5 × 71 × 739
2019-07-13717395.814e-80.04210.0567
420722525964720671748753991652.523769161
3 × 83 × 3089
2019-07-138330891.905e-70.09680.1232
4207225259259162719908254971754.5253079972
22 × 7 × 317 × 347
2019-07-133173477.225e-70.12510.2532
4207225259715708562340580183992065.9568505707661
32 × 11 × 89 × 359 × 2689
2020-12-2135926890.00330.19070.2867

57 Composite Factors:
P-1 results:
No P-1 results for M4207225259


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2019-07-1324424544.874146.89671e-112,316,29014.89
2019-07-1325025150.971162.24939e-8246,9984.78757e-8
TF systematically completed to 64 but no per-exponent detailed record exists
2019-07-1325225352.523164.78738e-8246,9981.01894e-7
2019-07-1325425554.525171.52110e-7246,9983.23748e-7
2020-12-21slaurnocebo-165026426865.956200.0132,316,2900.027
2022-02-03ramgeisr4mg31s275276--1.819--
2022-02-08ramgeisr4mg31s276277--3.638--
2022-04-07ramgeisr4mg31s27727844.874147.2752,316,29014.89
2022-04-07ramgeisr4mg31s27727832.970107.2752,316,29014.89
2022-04-24ramgeisr4mg31s278279--14.55--


ECM factoring results:
No ECM results for M4207225259


Lucas-Lehmer results:
No L-L results for M4207225259


PRP results:
No PRP results for M4207225259


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
TF factor-bounds graph:
279
278
277
276
268
255
253
251
245
this exponent TF target: 92
250
260
270
280
290
2100
Last modified: 2023-07-11T14:45:05+00:00