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? prev_prime;

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prev_prime

Run Example
(%i1)sin(%pi/2);
(%o1)                                  1
(%i2) cos(%pi/4);
                                       1
(%o2)                               -------
                                    sqrt(2)
(%i3) Binomial(7,3);
(%o3)                           Binomial(7, 3)
(%i4) binomial(7,3);
(%o4)                                 35
(%i5) factor(210);
(%o5)                               2 3 5 7
(%i6) Next_prime(1);
(%o6)                            Next_prime(1)
(%i7) next_prime(1);
(%o7)                                  2
(%i8) next_prime(8);
(%o8)                                 11
(%i9) prev_prime(2009);
(%o9)                                2003
(%i10) load(functs);
(%o10)     /usr/share/maxima/5.21.1/share/simplification/functs.mac
(%i11) permutation(10,3);
(%o11)                                720
(%i12) load(descriptive);
(%o12) /usr/share/maxima/5.21.1/share/contrib/descriptive/descriptive.mac
(%i13) mean([1,2,3,4,5,6,7]);
(%o13)                                 4
(%i14) 
Run Example
sin(%pi/2);
(%o1)                                  1
(%i2) cos(%pi/4);
                                       1
(%o2)                               -------
                                    sqrt(2)
(%i3) Binomial(7,3);
(%o3)                           Binomial(7, 3)
(%i4) binomial(7,3);
(%o4)                                 35
(%i5) factor(210);
(%o5)                               2 3 5 7
(%i6) Next_prime(1);
(%o6)                            Next_prime(1)
(%i7) next_prime(1);
(%o7)                                  2
(%i8) next_prime(8);
(%o8)                                 11
(%i9) prev_prime(2009);
(%o9)                                2003
(%i10) 
Run Example
n:1555554;
(%o1)                               1555554
(%i2) floor(n*float(log(n)));
(%o2)                              22178065
(%i3) primep(floor(n*float(log(n))));
(%o3)                                false
(%i4) next_prime(floor(n*float(log(n))));
(%o4)                              22178071
(%i5) prev_prime(floor(n*float(log(n))));
(%o5)                              22178033
(%i6) 

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