is 2 4979903 - 1
has 1499101 decimal digits
takes 0.690 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
Actual2675.966865.6716 %2560001055220601.20417.1112 %7.170968.1128 %
Target2651.465064.6154 %3400035000000.04482.4144 %1.509865.4697 %
Difference+2+4.5017+1.0563 %+222000+102022060+1.1594+4.6968%+5.6611+2.6431 %

Known prime factors (2 factors, 110.2 bits, 0.00221194% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4979903367210577365511445.0623686925
3 × 52 × 11 × 41 × 109
-411099.748e-78.985e-61.677e-5
4979903392914993280745312072065.0913945006491901
3 × 23 × 57174007129
2018-05-3023571740071291.5693626.071,169.3

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2023-12-08USAFSS6917th_Scty_Sq256000105522060
skipped known factor: 36721057736551
--1.2048.554%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2018-05-30TJAOIManual testing265266*
65.091
20
0.136


ECM factoring results:
Total ECM effort:0.632 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.632


Lucas-Lehmer results:
No L-L results for M4979903


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
36721057736551
5378A3AA6DDDF16E
2018-04-23Oliver KruseGTX-0
36721057736551
5378A3AA6DDDF16E
2018-07-05Hazar Temizel
36721057736551
39291499328074531207
D62FA370979B7CB8
2018-07-06Martin RussellThunderChoad
36721057736551
39291499328074531207
D62FA370979B7CB8


CERT results:
No CERT results for M4979903


P-1 factor-bounds graph:
B1 = 256000, B2 = 105522060 (P-1 stage 2)
B1 = 256000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00