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Old 2010-11-16, 23:53   #100
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basically I'm trying to use the sumdigit(p) to determine k values to check if that helps it should be useful in finding factors.
Factors? Of what?
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Old 2010-11-17, 00:00   #101
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Factors? Of what?
the Mersenne numbers with prime exponents that aren't prime lol.
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Old 2010-11-17, 11:26   #102
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the Mersenne numbers with prime exponents that aren't prime lol.
2(a*b) - 1 = (2a-1) * (1 + 2a + 22a + 23a + ... +2(b-1)a)

There you go.

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Old 2010-11-17, 13:16   #103
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2(a*b) - 1 = (2a-1) * (1 + 2a + 22a + 23a + ... +2(b-1)a)

There you go.
that tells me nothing that I want. for a prime exponent unless you use decimal a and b you get 2^p-1 = (2^1-1)*(2^p-1)

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Old 2010-11-17, 23:18   #104
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I find that the sum of digit squares for A095847 seems to join up with every other so far (I've tested until 5810550306096509) or be 1 ( only 1 that has fit this so far outside of the obvious 1)
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Old 2010-11-18, 00:02   #105
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that tells me nothing that I want. for a prime exponent unless you use decimal a and b you get 2^p-1 = (2^1-1)*(2^p-1)
Oh; Now I see what you wanted;

2p -1 = (2kp+1) * ((2p -1)/2kp+1))

There you go.

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Originally Posted by science_man_88 View Post
I find that the sum of digit squares for A095847 seems to join up with every other so far (I've tested until 5810550306096509) or be 1 ( only 1 that has fit this so far outside of the obvious 1)
This is too vague. Provide a clear explanation, free of ambiguous terms, of what you are doing, which probably has nothing to do w/Mersenne numbers.

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Old 2010-11-18, 00:16   #106
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Oh; Now I see what you wanted;

2p -1 = (2kp+1) * ((2p -1)/2kp+1))

There you go.



This is too vague. Provide a clear explanation, free of ambiguous terms, of what you are doing, which probably has nothing to do w/Mersenne numbers.


1^2 + 7^2 +3^2 +6^2 = 95||||9^2+5^2 = 106 ||||1^2 + 6^2 = 37||||3^2+7^2 = 58  etc.

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Old 2010-11-18, 00:19   #107
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1^2 + 7^2 +3^2 +6^2 = 95||||9^2+5^2 = 106 ||||1^2 + 6^2 = 37||||3^2+7^2 = 58  etc.
Okay; This does not explain anything. Please explain its purpose.


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This is too vague. Provide a clear explanation, free of ambiguous terms, of what you are doing.

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Old 2010-11-18, 00:22   #108
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Okay; This does not explain anything. Please explain its purpose.
do the same thing for the other ones only one exception other than 1 in the list of non 0 terms that doesn't cross paths with another.
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Old 2010-11-18, 00:27   #109
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do the same thing for the other ones only one exception other than 1 in the list of non 0 terms that doesn't cross paths with another.
What "other ones"? What list? A095847?
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Old 2010-11-18, 00:33   #110
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Okay; This does not explain anything. Please explain its purpose.
Code:
(20:31) gp > v=input()
[3,2,2]
%28 = [3, 2, 2]
(20:31) gp > sum(X=1,#v,v[X]^2)
%29 = 17
(20:32) gp >
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