is 2 168173323 - 1
has 50625215 decimal digits
takes 1,144.513 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
Actual277182.003763.6364 %100000010000009.86811.6549 %191.871764.2381 %
Target278364.008464.1026 %1000000180000000106.10543.9214 %470.113865.5102 %
Difference-1-182.0047-0.4662 %--179000000-96.2374-2.2665 %-278.2421-1.2721 %

Known prime factors (1 factor, 81.7 bits, 0.00004858% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16817332339454872177042121929663112581.70611730419389120985
5 × 7 × 83 × 317 × 108413 × 117497
2021-06-081084131174972,912.11.07472.1773

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-06-08Tucker KaoDozenal_Behemoth_Lab1000000100000012581.7069.871.479%


Trial Factoring results:
57585960616263646566676869707172737475767778
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-07-07rabbutrabbit2632640.012
2011-02-16opyrtScruffy2642650.022
2013-03-28Richardsvn_022652660.044
2015-06-04yangyiMain2662670.089
2016-03-31XZTManual testing2672680.178
2016-09-04nate.andersManual testing2682690.355
2017-04-27Andrew BManual testing2692700.711
2018-02-27Oliver KruseManual testing27027689.58
2021-05-16Tucker KaoManual testing27627791.00


ECM factoring results:
No ECM results for M168173323


Lucas-Lehmer results:
No L-L results for M168173323


PRP results:
No PRP results for M168173323


CERT results:
No CERT results for M168173323


P-1 factor-bounds graph:
B1 = 1000000 (P-1 stage 1)
104
105
106
104
105
106
TF factor-bounds graph:
277
276
270
269
268
267
266
265
264
this exponent TF target: 78
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00