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Topic: A question about prime numbers
Replies: 3   Last Post: Dec 10, 2000 1:35 AM

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r3769

Posts: 30
Registered: 12/12/04
A question about prime numbers
Posted: Dec 7, 2000 7:52 PM
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The following ubasic program displays all the primes between 5 and 1000:

10 point 250
20 for x=5 to 1000
30 x1=1//x
40 n=1
50 a=ceil((n+1//x1)-1
60 if a-n-1=0 then 80
70 if ceil(n//(a-n-1))>=x then print x:goto 110:endif
80 x1=a*x1-n
90 n=n+1
100 if n<6*x then 50
110 next x

My question is: why?

Regards,

R. Burge








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