is 2 4248866213 - 1
has 1279036178 decimal digits
takes 1,149,996.949 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
Actual2710.112554.9296%----0.112554.9296%
Target292236,056.892565.2174%200000009600000000212,689.82294.2606%448,746.715466.6993%
Difference-21-236,056.7800-10.2878%-20000000-9600000000-212,689.8229-4.2606%-448,746.6029-11.7698%

Known prime factors (6 factors, 289.9 bits, 0.00000682% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
42488662135693480725431239.05167
67
2012-08-201671.999e-110.00180.0025
424886621325068310656711341.189295
5 × 59
2019-07-135591.174e-100.00310.0040
424886621359739058954791342.442703
19 × 37
2019-07-1319372.308e-100.00780.0152
4248866213150239909291691443.7721768
23 × 13 × 17
2019-07-1313173.336e-100.00520.0104
42488662135976730541736402411859.05270333240
23 × 5 × 107 × 16433
2020-01-13107164331.980e-50.39110.6564
4248866213237730660557259061212064.3662797577620
22 × 5 × 8581 × 16301
2021-01-148581163010.00093.53276.8538

57 Composite Factors:
P-1 results:
No P-1 results for M4248866213


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2019-07-1324124241.189134.84276e-11249,1491.02952e-10
2019-07-1324224342.442139.29154e-11249,1491.97527e-10
2019-07-1324324443.772145.77848e-11249,1491.22844e-10
2020-01-14slaurpalvi2-rtx2126459.052180.001234,3960.002
2021-01-14slaurnocebo-165026426864.366200.0132,338,8300.027
2023-08-09slaurpalvi2-rtx268271--0.098--
Missing TF 71 - 72
Missing TF 72 - 73
Missing TF 73 - 74
Missing TF 74 - 75
2022-02-03ramgeisr4mg31s275276--1.801--
2022-02-06ramgeisr4mg31s276277--3.602--
2022-04-07ramgeisr4mg31s277278--7.204--
2022-04-25ramgeisr4mg31s278279--14.41--


ECM factoring results:
No ECM results for M4248866213


Lucas-Lehmer results:
No L-L results for M4248866213


PRP results:
No PRP results for M4248866213


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
TF factor-bounds graph:
279
278
277
276
271
268
264
244
243
242
this exponent TF target: 92
250
260
270
280
290
2100
Last modified: 2023-08-09T14:41:18+00:00