is 2 2477641 - 1
has 745845 decimal digits
takes 0.172 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.992867.1642%2000000600000000.51907.6402%12.511869.6729%2.5087%
PrimeNet2590.031062.7119%100001800000.00192.5336%0.032963.6566%0.9447%
GPU722630.644265.0794%110001600000.00191.3796%0.646165.5611%0.4818%
Difference+4+11.3487+2.0848%+1989000+59840000+0.5170+6.2606%+11.8657+4.1118%+4.1118%

Known prime factors (1 factor, 30.5 bits, 0.00122958% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
247764114816293191030.465299
13 × 23
-13236.147e-111.362e-62.661e-6

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-07-04T12:37:34alpertronManual testing20000006000000012-
skipped known factor: 1481629319
--0.519--7.640%


Trial Factoring results:
No TF results for M2477641


ECM factoring results:

Old Calculation Method

Total ECM effort:0.275 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.275 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.275


Lucas-Lehmer results:
No L-L results for M2477641


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-14T02:30:01Oliver KruseGTX-3E4F43F2FC7EF33__no
2017-11-29T09:30:09storm55107700_Kaby_Lake
1481629319
E4F43F2FC7EF33__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2019-07-04T12:37:34+00:00