is 2 1772737 - 1
has 533648 decimal digits
takes 0.096 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
Actual26716.761668.6567 %500000150000000.10155.0492 %16.863170.2393 %
Target2610.173365.5738 %80006000000.00321.4548 %0.176466.0746 %
Difference+6+16.5883+3.0829 %+492000+14400000+0.0983+3.5944%+16.6866+4.1647 %

Known prime factors (3 factors, 191.8 bits, 0.01082081% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17727375533775819211239.009156080
24 × 5 × 1951
-1619517.368e-89.552e-61.565e-5
1772737542369299351240965912065.55615297511682535
3 × 5 × 1019834112169
2019-01-15510198341121697.63294,370.88,163.4
17727371851988088988010773887971372787.25952235274859948508264
23 × 19 × 23 × 103 × 2659 × 123931 × 440207
2015-06-0912393144020724,507,8270.01110.0198

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-06-09alpertronManual testing500000150000001222787.2590.1018.834%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2019-01-15TJAOIManual testing265266*
65.556
20
2.343


ECM factoring results:
Total ECM effort:38.624 GHz-days
Estimated T-Level:25.717
DigitsB1CompleteFacMiss
201100014.8230.000%
25500001.68418.567%
302500000.14386.638%
3510000000.01099.012%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025817.76
250000400000004920.87


Lucas-Lehmer results:
No L-L results for M1772737


PRP results:
dateuseridcompidcofactorsres64
2017-10-03Oliver KruseGTX-3
553377581921
185198808898801077388797137
F1E6DFCF52521C38
2017-10-05Oliver KruseManual testing
553377581921
185198808898801077388797137
F1E6DFCF52521C38
2017-11-10kkmrkkblmbrbkc4.xlarge
553377581921
185198808898801077388797137
F1E6DFCF52521C38
2019-01-16treborLaptop
553377581921
54236929935124096591
185198808898801077388797137
A0DAD7F377BCACD1
2019-01-16ATHec2-PRPCFDC
553377581921
54236929935124096591
185198808898801077388797137
A0DAD7F377BCACD1


CERT results:
No CERT results for M1772737


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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1010
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TF factor-bounds graph:
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00