Sum of two adjacent numbers are primes: Difference between revisions
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Here, we generate the first 20 odd primes, divide by 2, drop the fractional part and add 0 and 1 to that value. Then we format that pair of numbers with their sum and with decorations indicating the relevant arithmetic: |
Here, we generate the first 20 odd primes, divide by 2, drop the fractional part and add 0 and 1 to that value. Then we format that pair of numbers with their sum and with decorations indicating the relevant arithmetic: |
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<lang J> (+/,&":'=',{.,&":'+',&":{:)"#. 0 1+/~<. |
<lang J> (+/,&":'=',{.,&":'+',&":{:)"#. 0 1+/~<.-: p:1+i.20 |
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3=1+2 |
3=1+2 |
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5=2+3 |
5=2+3 |
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