+TheBF Posted September 5, 2018 Author Share Posted September 5, 2018 (edited) 28649 (>6FE9) is, indeed, prime, but >6FE5 (28645) is not. It is the latter that TI used. The number (>7AB9) TI used to add to the product of >6FE5 and the value at >83C0 is not prime either. They do not have any primes in common, however. I always thought the bit pattern of the two numbers might be important, but I am not sure. It is kind of interesting that the second number is π to 5 places with 1 added to the last place—as though to insure the lowest bit is 1. In fact the lowest bit of both numbers is 1. ...lee Good catch. Moving too fast this morning. I was looking for a close prime number to 6FE5 for the experiment. So the evidence is point to the fact the choosing these internal numbers is important. Edited September 5, 2018 by TheBF Quote Link to comment Share on other sites More sharing options...
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