is 2 4022783 - 1
has 1210979 decimal digits
takes 0.502 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-daysProbabilityProb over default TF
Actual2677.386467.1642%40000000064400000000702.934421.7856%710.320974.3177%7.1535%
PrimeNet2610.076463.9344%160003200000.00592.7307%0.082264.9193%0.9848%
GPU722651.813666.1538%220003600000.00731.7510%1.820966.7465%0.5926%
Difference+2+5.5728+1.0103%+399978000+64399640000+702.9271+20.0346%+708.4999+7.5712%+6.5608%

Known prime factors (2 factors, 150.7 bits, 0.00374498% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
40227838045567722.9401
1
-111.389e-131.808e-73.681e-7
402278327882044532751181524084683039493831484939127.71334655168490011991106759528216528
24 × 7 × 31 × 80111 × 1019467 × 3712259 × 32921885803
2022-06-283712259329218858034.507e+10325.02605.85

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
4022783224326857385233325281185431068011267298472438346150.652
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-06-28T16:34:11onlinegameManual testing4000000006440000000039127.713702.91.0031,40621.786%


Trial Factoring results:
No TF results for M4022783


ECM factoring results:
Total ECM effort:0.540 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.540


Lucas-Lehmer results:
No L-L results for M4022783


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-12T17:23:59kkmrkkblmbrbkc4.xlarge
8045567
38EA196FAA85CA__no
2018-01-05T14:26:17Meracaynz
8045567
38EA196FAA85CA__no
2022-06-29T11:47:48onlinegameManual testing
8045567
278820445327511815240846830394938314849
38EA196FAA85CA96no


P-1 factor-bounds graph:
B1 = 400000000, B2 = 64400000000 (P-1 stage 2)
B1 = 400000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-06-29T11:47:48+00:00