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Old 2018-07-19, 14:26   #1
cmd
 
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Thumbs up index of TF

__ 0 1 2 3 4

__ 0 2 4 6 8
05 | 01
15 | 03 <<== 2+1 ( 2+1 ) index 2

35 | 07
45 | 09 <<== 5+4 ( 03*03 ) index 5
-
55 | 11
65 | 13

85 | 17
95 | 19
__ 1 3 5 7 9


2z-1 == (z+1)/2


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Last fiddled with by cmd on 2018-07-19 at 14:52 Reason: 1 ( true ) 1 is not prime
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Old 2018-07-19, 14:44   #2
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Quote:
Originally Posted by cmd View Post
2z-1 == (z+1)/2
z==1
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Old 2018-07-19, 15:01   #3
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Quote:
Originally Posted by science_man_88 View Post
z==1

I ... sm88


pari gp > if ( z == 49 , print ( " 97 is prime " ) )
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Old 2018-07-19, 15:12   #4
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Quote:
Originally Posted by cmd View Post
I ... sm88


pari gp > if ( z == 49 , print ( " 97 is prime " ) )
congruence works in this case for divisors of 72 = (2*49-1)-((49+1)/2)=97-25
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Old 2018-07-19, 15:34   #5
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Quote:
Originally Posted by science_man_88 View Post
congruence works in this case for divisors of 72 = (2*49-1)-((49+1)/2)=97-25
25 is index of num 49 ( 25+24 ) 07 ( 4+3 ) 07^2 ( z=25) (z+=35) ndx 60 num 119 = 120-1
49 is ndx of num 97 ( 49+48 )

( z+=35 ) 95 ndx of num 189
( z+=35 ) 130 ndx of num 259
for ever ... continue
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Old 2018-07-24, 14:24   #6
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unique "grid" model
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Last fiddled with by cmd on 2018-09-24 at 13:24
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Old 2018-10-16, 13:17   #7
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"group" H 11

group Y 21 ( sequence ) 43, 109, ... oo








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Old 2018-10-16, 13:38   #8
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Wink

u see structure :



___ = 777

.._ = 778

replace line for prime


+ ( 776 )
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Last fiddled with by cmd on 2018-10-16 at 15:16 Reason: where you see a symmetry, find order
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Old 2019-11-21, 16:21   #9
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5of10
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Old 2019-11-25, 13:13   #10
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dec

0 0
1 9 x
2 8
3 7 +
4 6
5 5 *
6 4
7 3 +
8 2
9 1 x


hex
0 0
1 f
2 e
3 d
4 c +
5 b
6 a *
7 9
8 8 *
9 7
a 6 *
b 5
c 4 +
d 3
e 2
f 1





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