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Old 2009-07-27, 19:31   #23
smh
 
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502304 done
Code:
Sequence ended: Prime
6 Merges:
Merge at n=2837 with 19968, n=643
Merge at n=2867 with 4428, n=5
Merge at n=2883 with 1088, n=1
Merge at n=2884 with 224, n=6
Merge at n=2889 with 80, n=1
Merge at n=2891 with 48, n=2
Taking 502740
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Old 2009-07-27, 23:04   #24
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reserving: 504390, 504532
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Old 2009-07-28, 04:59   #25
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Phi(4,2^7658614+1)/2

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Done with
501520
501672
501678
501780
501894
501978
all in DB.
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Old 2009-07-28, 08:19   #26
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502344 Done and in the DB

taking 502830
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Old 2009-07-28, 09:14   #27
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unreserving 501426 size 119 i=2586 2^3*3^2*5^2 c99
reserving 502776
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Old 2009-07-28, 14:08   #28
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502740 Done and in the DB

Taking 503820
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Old 2009-07-28, 23:45   #29
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504532 done. size 103. 2^4*31
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Old 2009-07-29, 00:02   #30
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reserving 504168
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Old 2009-07-29, 10:09   #31
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Retiring 500010: line 4606, size 100, 2^4*3^2, c90. This might be interesting to extend since it is long and doesn't have a driver.

Reserving 502812.

Last fiddled with by 10metreh on 2009-07-29 at 10:22
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Old 2009-07-29, 14:14   #32
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Done with 500424: size 106, 2^5*3*C104

Size 104 cofactor had ecm run on it without success. If the C104 has two factors as expected, there is a 50% chance that the 2's exponent will increase to 2^6 or more.


(Reason: 3+1 = 4 => 2 factors of 2. C104 is 3 mod 4 so if there are two primes, then one is equal to 1 mod 4 and one is 3 mod 4.
The one that is one mod 4 adds 1 factor of 2. The one that is 3 mod 4 has a 50% chance of adding 2 factors of 2. With 5 factors of 2 for sigma, the exponent of two will increase. If the 3 mod 4 has more than two factors of 2 (i.e. p+1 divisible by 8), then we have a 2^6 term for sigma and the 2^5 remains.)
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Old 2009-07-29, 20:25   #33
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502830 Done

Reserving 503280 and 503406

Last fiddled with by smh on 2009-07-29 at 20:37
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