素数間隔の平方根
アンドリカの予想について：連続する素数の平方根の差は1未満であるという仮説。pnとpn+1が連続する素数の場合、√pn+1 − √pn < 1が成り立つと予想されており、2×10^19までの素数で経験的に確認されている。
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