Prime number finder HP11C?

[rprosperi]

(06-19-2016 01:14 PM)jbhp55 Wrote:  'the whole thing' is in fact quite short:

0xP+L(K:1)x0+PRIME=(L(C:1)-C+SIGMA(D:3:SQRT(P)+1:2:IF(FP(P/D)<>0:1+L(C:D)x0+L(K:0)x0)))xK+PxK+L(P:P+2)x0

(SIGMA means the Greek capital, of course)

This equation will not verify on my 27S, producing error "Invalid Equation" with cursor blinking on the 1st of 3 adjacent ")" towards the end of the equation.

As I'm not 100% sure of the algorithm, it's hard to figure out exactly what is missing, but the else clause of the IF (after the missing 2nd ":") seems to be missing?

Anyone?

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