Special neighbor primes: Difference between revisions

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=={{header|REXX}}==
<lang rexx>/*REXX programpgm finds special neighbor primes: P1, P2, P1+P2-1 are primesprime, and P1 and P2 < 100*/
parse arg hi cols . /*obtain optional argument from the CL.*/
if hi=='' | hi=="," then hi= 100 /*Not specified? Then use the default.*/