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Old 2017-02-10, 15:14   #155
paulunderwood
 
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Quote:
Originally Posted by cmd View Post
Code:
? isprime(111111111111111111111111111111111111061)
1
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Old 2017-02-10, 15:49   #156
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Quote:
Originally Posted by paulunderwood View Post
Code:
? isprime(111111111111111111111111111111111111061)
1

thx
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Old 2017-02-12, 02:29   #157
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fdb now works again,

but the link id=1100000000900921624
is still wrong

"status C" .. erase ..







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Old 2017-02-12, 11:50   #158
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Quote:
Originally Posted by cmd View Post
fdb now works again,

.. mo__re ..




Code:
 
Quote:
Originally Posted by cmd View Post
fdb now works again, but in image attachments, find .. mo__re .. mo_er_dup#keyid ..
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Old 2017-02-15, 13:23   #159
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The core on "Factoring numbers <70 digits" frequently hangs (last event >1 hour), and there's a large number of small composites without known factors (<30 digits).

Don't think this is normal behavior.

Edit: Can someone double check if the following four 39-digit numbers labelled "C" are actually prime?

111111111111111111111111111111111111061
111111111111111111111111111111111111061
111111111111111111111111111111111110957
111111111111111111111111111111111110947

Last fiddled with by GeoffreyY on 2017-02-15 at 13:46
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Old 2017-02-15, 14:42   #160
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Quote:
Originally Posted by GeoffreyY View Post
The core on "Factoring numbers <70 digits" frequently hangs (last event >1 hour), and there's a large number of small composites without known factors (<30 digits).

Don't think this is normal behavior.

Edit: Can someone double check if the following four 39-digit numbers labelled "C" are actually prime?

111111111111111111111111111111111111061
111111111111111111111111111111111111061
111111111111111111111111111111111110957
111111111111111111111111111111111110947
There are only three distinct numbers here, and they are all prime.

Last fiddled with by BudgieJane on 2017-02-15 at 14:43 Reason: Add "distinct"
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Old 2017-02-15, 20:26   #161
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I just started doing some Primo certificates in the 2400d range and seem to be getting a lot of composites from the PRP listing. Is this indicative of a problem associated with the above mentioned C vs. P issues, or is it normal?
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Old 2017-02-16, 01:15   #162
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There is also a C79 in the list of composite numbers without known factors that is prime:

(10^79-181)%(10^79-1)/9

Appears to be more of cmd's handiwork.....

Last fiddled with by richs on 2017-02-16 at 01:53 Reason: Updated
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Old 2017-02-18, 04:17   #163
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Quote:
Originally Posted by richs View Post
There is also a C79 in the list of composite numbers without known factors that is prime:

(10^79-181)%(10^79-1)/9

Appears to be more of cmd's hand_[i]_work..
id .. times

[__] [ ] [__]
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Old 2017-03-01, 12:53   #164
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There are primes that return composite in factordb, such as:

4*143##+1
4*173##+1
4*186##+1
4*180##-1
4*228##-1
4*268##-1
4*301##-1

Also, there are composites that return prime in factordb, such as:

2^17058*210681-1 (equals (2^8529*459-1) * (2^8529*459+1))
2^22910*837225-1 (equals (2^11455*915-1) * (2^11455*915+1))

Besides, PRP 108^398*109+1 should be easy to prove by N-1. But factordb thinks 108^398*109 is 2*5*109 so N-1 is only 0.259% factored, I think that there are the same bug to some other numbers.
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Old 2017-03-14, 14:57   #165
GeoffreyY
 
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factordb still thinks that these two are 82 digit composites:
9699691 (id 1100000000912669113)
223092871 (id 1100000000912669114)
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