Fermat Lattice
400 × 400
a₀
−400
+400
b₀
−400
+400
go to
cells
class
v = a²−b²
p = a−b
q = a+b
sieve ≤
off
3
5
7
11
13
17
size
Sophie Germain
row/col/diag
10s
hyperbola v
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v =
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P·P
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survivors
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