is 2 106186621 - 1
has 31965359 decimal digits
takes 435.513 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
Actual276144.123664.4737 %8980005257000022.08264.7144 %166.206266.1485 %
Target276144.123664.4737 %70000012000000042.81733.9711 %186.940865.8845 %
Difference---+198000-67430000-20.7346+0.7433%-20.7346+0.2641 %

Known prime factors (1 factor, 86.3 bits, 0.00008128% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
106186621955115319280071923237612632686.304449734302817711811
181 × 1607 × 32563 × 47482891
2021-09-153256347482891282,10315.56828.735

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-09-15Ben Deloi-071acb8d7482947198980005257000022686.30422.084.714%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-04-22wmjmoellerconrac012632640.018
2010-09-03oodairacom22642650.035
2012-05-15omiXorpLLB03-z800-192652660.070
2013-09-08SMoffatManual testing2662670.141
2013-09-19processinfoManual testing2672680.281
2013-09-21Adam StinchcombeManual testing2682690.563
2013-09-22AdolfNorManual testing2692701.126
2014-05-24Andreas_TruetschManual testing2702712.252
2015-01-08Ilya AlexandrovManual testing2712724.504
2020-03-27el groccoGPU72_TF2722739.008
2020-04-29XZTManual testing27327418.02
2021-04-06TheJudgerManual testing274276108.1


ECM factoring results:
No ECM results for M106186621


Lucas-Lehmer results:
No L-L results for M106186621


PRP results:
No PRP results for M106186621


CERT results:
No CERT results for M106186621


P-1 factor-bounds graph:
B1 = 898000, B2 = 52570000 (P-1 stage 2)
B1 = 898000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
276
274
273
272
271
270
269
268
267
266
265
264
this exponent TF target: 76
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00