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PROG
| (PARI) cfracnum(m, f) = { local(x, r, cfr, i, m1); default(realprecision, 3000); numer2=0; denom2=0; cfr = vector(m+100); x=f; for(n=0, m, i=floor(x); x=1/(x-i); cfr[n+1] = i; ); for(m1=0, m, r=cfr[m1+1]; forstep(n=m1, 1, -1, r = 1/r; r+=cfr[n]; ); numer=numerator(r); denom=denominator(r); if(ispseudoprime(numer), print1(denom", ")); ); default(realprecision, 28);
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