is 2 14779 - 1
has 4449 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
Assigned as ecm on 2023-05-17, 0.0% done, ETC 2023-07-22
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672,010.549979.1045%730000000030020805351537000565,244.115436.5202%567,254.665386.7356%
Target2440.000268.1818%500100000.00001.4237%0.000268.6348%
Difference+23+2,010.5498+10.9227%+7299999500+30020805351527000+565,244.1154+35.0965%+567,254.6652+18.1007%

Known prime factors (5 factors, 264.4 bits, 1.78901904% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14779266023618.0219
32
-992.368e-123.110e-96.330e-9
14779104715717771133.286354272
25 × 11071
2008-08-2632110711.303e-72.189e-73.895e-7
14779204229367078688171754.181690944472152
23 × 11 × 47 × 277 × 603091
2008-08-262776030910.25211.145e-52.121e-5
147797872678421593278167692169.41526634679009382496
25 × 3 × 13 × 47 × 454082770891
2008-08-294745408277089115,1818.549615.968
147798727607666526568923636208732789.49629527057536120742011084
22 × 33 × 11 × 107 × 22741 × 10214341972589
2009-06-1022741102143419725891.382e+10192.32359.20

26 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-08-02ViliamF325000000042750000000-
skipped known factor: 266023
skipped known factor: 10471571777
skipped known factor: 20422936707868817
--0.887--14.970%
2021-08-27Seth_TrManual testing400000000400000000-
skipped known factor: 266023
skipped known factor: 10471571777
skipped known factor: 20422936707868817
--0.138--7.874%
2023-05-27JacobZGreatLakes730000000030020805351537000-
skipped known factor: 266023
skipped known factor: 10471571777
skipped known factor: 20422936707868817
skipped known factor: 787267842159327816769
skipped known factor: 872760766652656892363620873
--565,244--36.520%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-08-26ANONYMOUSManual testing??33.286115.28266e-80.0002.48688e-6
2008-08-26ANONYMOUSManual testing??54.181170.0907.39632e-60.188


ECM factoring results:
Total ECM effort:22.955 GHz-days
Estimated T-Level:36.606
DigitsB1CompleteFacMiss
2011000494.6430.000%
2550000109.1210.000%
3025000018.9240.000%
3510000002.6936.766%
4030000000.32172.529%
45110000000.03396.714%
50440000000.00399.696%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
10.00000e+0
500005000000850.021
250000250000005510.685
50000050000000100.025
10000001000000001,4217.066
30000003000000001,01615.16


Lucas-Lehmer results:
No L-L results for M14779


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KruseOliver-PC
266023
10471571777
20422936707868817
787267842159327816769
872760766652656892363620873
88B05FEF6B7F4951no
2017-09-21Oliver KruseManual testing
266023
10471571777
20422936707868817
787267842159327816769
872760766652656892363620873
88B05FEF6B7F4951no
2017-10-02kkmrkkblmbrbkManual testing
266023
10471571777
20422936707868817
787267842159327816769
872760766652656892363620873
88B05FEF6B7F49__no
2017-12-07ATHManual testing
266023
10471571777
20422936707868817
787267842159327816769
872760766652656892363620873
88B05FEF6B7F49__no
2020-04-17Oliver KruseManual testing
266023
10471571777
20422936707868817
787267842159327816769
872760766652656892363620873
61AC6DDF5F9A2D__no


P-1 factor-bounds graph:
B1 = 7300000000, B2 = 30020805351537000 (P-1 stage 2)
B1 = 7300000000 (P-1 stage 1)
B1 = 250000000, B2 = 42750000000 (P-1 stage 2)
B1 = 400000000 (P-1 stage 1)
B1 = 250000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
109
1010
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
TF factor-bounds graph:
2
this exponent TF target: 44
TF double-checked to: 67.8
ECM T-Level=36.61 ~= 105-bit
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2100
2110
Last modified: 2023-05-29T14:10:06+00:00