is 2 1836151 - 1
has 552737 decimal digits
takes 0.100 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
Actual26716.182768.6567 %500000150000000.10155.0706 %16.284270.2460 %
Target2610.167365.5738 %90007000000.00371.5957 %0.171066.1231 %
Difference+6+16.0154+3.0829 %+491000+14300000+0.0978+3.4749%+16.1132+4.1229 %

Known prime factors (1 factor, 43.7 bits, 0.00237771% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1836151138819185067371443.6583780168
23 × 3 × 7 × 22501
-8225017.774e-79.703e-50.0002

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012
skipped known factor: 13881918506737
---8.868%


Trial Factoring results:
5758596061626364656667
No TF results for M1836151


ECM factoring results:
Total ECM effort:39.352 GHz-days
Estimated T-Level:25.712
DigitsB1CompleteFacMiss
201100015.0430.000%
25500001.68618.521%
302500000.14286.725%
3510000000.01099.028%


ECM Summary

B1B2factorcurvesGHz-days
500005000000362.487
50000660000021516.75
250000400000004720.12


Lucas-Lehmer results:
No L-L results for M1836151


PRP results:
dateuseridcompidcofactorsres64
2017-10-04Oliver KruseGTX-2
13881918506737
EF18CE4772005F6A
2017-11-06ATHec2-1xh
13881918506737
EF18CE4772005F6A


CERT results:
No CERT results for M1836151


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
250
260
270
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00