is 2 3749833 - 1
has 1128813 decimal digits
takes 0.394 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
Actual2677.924167.1642 %2000001303648501.11056.8104 %9.034569.4004 %
Target2640.949265.6250 %2200022500000.02182.1107 %0.971066.3505 %
Difference+3+6.9749+1.5392 %+178000+128114850+1.0886+4.6997%+8.0635+3.0499 %

Known prime factors (2 factors, 124.2 bits, 0.00331341% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3749833427116464733001211755.2455695139820
22 × 3 × 5 × 94918997
1998-02-125949189970.00160.78761.4709
37498335909876706382206251112169.00278801865394835
3 × 5 × 11 × 172 × 23 × 71850017
2022-05-272897185001744.3640.59621.1134

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-04-16JossManual testing200000200000--0.0302.147%
2022-05-27JossManual testing20000013036485022169.0021.3199.019%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-02-12ANONYMOUSv4_computers??
55.245
17


ECM factoring results:
Total ECM effort:0.448 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.448


Lucas-Lehmer results:
No L-L results for M3749833


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
42711646473300121
05FC631D984169DB
2017-12-04Oliver KruseThreadripper-PC
42711646473300121
05FC631D984169DB
2022-06-02XZT600G2Mini5
42711646473300121
590987670638220625111
1F4EBC4D25FE57EA


CERT results:
dateuseridcompid
2022-06-02Ben Deloi-0a64a7c2ed5dff7d9


P-1 factor-bounds graph:
B1 = 200000, B2 = 130364850 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
100
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106
100
101
102
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105
106
107
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109
TF factor-bounds graph:
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
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Last modified: 2024-03-13T02:15:48+00:00