is 2 212483281 - 1
has 63963842 decimal digits
takes 1,866.607 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
Actual27536.011862.6667 %----36.011862.6667 %
Target279576.201564.5570 %1300000250000000189.15534.0310 %765.356865.9857 %
Difference-4-540.1897-1.8903 %-1300000-250000000-189.1553-4.0310 %-729.3450-3.3190 %

Known prime factors (1 factor, 75.1 bits, 0.00003535% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
212483281410538389835210932157912375.12096604868840295
3 × 5 × 127 × 139 × 364828901
2020-12-1213936482890136.012253.19472.89

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-12-12Markus TervoorenManual testing2375.12010.890.000%


Trial Factoring results:
5758596061626364656667686970717273747576777879
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2011-05-22Jonathan A ZylstraHP2642650.018
2013-08-17Lukin DmitryAstor2652660.035
2015-10-27Richardworkmy2662670.070
2016-08-22XZTManual testing2672680.141
2017-11-24John DeweyDellOptiplex3902682690.281
2019-02-08Niels_Mache_NextcloudManual testing2692700.563
2020-01-07Chabot PrimeCC3906-402702711.125
2020-06-12SRBaseManual testing2712722.251
2020-10-25SRBaseManual testing2722734.502
2020-12-13Markus TervoorenManual testing273274
2020-12-13Markus TervoorenManual testing274275


ECM factoring results:
No ECM results for M212483281


Lucas-Lehmer results:
No L-L results for M212483281


PRP results:
No PRP results for M212483281


CERT results:
No CERT results for M212483281


P-1 factor-bounds graph:
101
102
103
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
275
274
273
272
271
270
269
268
267
266
265
this exponent TF target: 79
TF double-checked to: 67
250
260
270
280
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00