[1,7,21,31,73,93,107,127,273,313,341,381,403,443,
471,511,1057,1137,1193,1273,1317,1397,1453,1533,
1571,1651,1707,1787,1831,1911,1967,2047,4161,4321,
4433,4593,4681,4841,4953,5113,5189,5349,5461,5621,
5709,5869,5981,6141,6211,6371,6483,6643,6731,6891,
7003,7163,7239]
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