is 2 211006879 - 1
has 63519400 decimal digits
takes 1,853.637 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
Actual27672.528463.1579 %10000003000000032.86364.6835 %105.392164.8834 %
Target279580.233264.5570 %1300000250000000189.15534.0277 %769.388465.9845 %
Difference-3-507.7048-1.3991 %-300000-220000000-156.2916+0.6558%-663.9964-1.1011 %

Known prime factors (1 factor, 80.7 bits, 0.00003824% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
21100687919511594095177114799228172580.6914623449763260352
26 × 3 × 331 × 34267 × 2123053
2021-01-113426721230531,160.51.88612.7519

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-01-11Albrecht HeefferManual testing10000003000000022580.69135.123.545%


Trial Factoring results:
5758596061626364656667686970717273747576777879
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-05-17Architects Cubedm1_082632640.009
2011-05-19Mr-PlonkLinux-i72642650.018
2013-08-17Richardsvn_022652660.035
2015-10-08rob147147Manual testing2662670.071
2016-08-24XZTManual testing2672680.142
2017-11-28YxinityManual testing2682690.283
2018-01-08daniel horacioG52682690.283
2017-11-28YxinityManual testing2692700.567
2019-11-14Neutron3529Manual testing2702711.133
2020-06-19SRBaseManual testing2712722.267
2020-10-20jwnutterManual testing2722734.533
2020-10-20jwnutterManual testing2732749.066
2020-10-20jwnutterManual testing27427518.13
2020-10-20jwnutterManual testing27527636.26


ECM factoring results:
No ECM results for M211006879


Lucas-Lehmer results:
No L-L results for M211006879


PRP results:
No PRP results for M211006879


CERT results:
No CERT results for M211006879


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
276
275
274
273
272
271
270
269
268
267
266
265
264
this exponent TF target: 79
TF double-checked to: 67
250
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JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00