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16 lines
401 B
16 lines
401 B
// This program prints the largest now known even perfect number.
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#include <cln/integer.h>
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#include <cln/integer_io.h>
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using namespace std;
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using namespace cln;
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int main ()
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{
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// previous ones were 1257787, 1398269, 2976221, 3021377, 6972593,
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// 13466917, 20996011, 24036583, 25964951, 30402457, 32582657, 37156667
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int p = 43112609;
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cl_I x = (((cl_I)1 << p) - 1) << (p-1);
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cout << x << endl;
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}
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