408: [-43200 = - 2^6 * 3^3 * 5^2, x^4-30*x^2-75]
     2153: [-43200 = - 2^6 * 3^3 * 5^2, x^4-2*x^3-14*x-11]
      461: [-49392 = - 2^4 * 3^2 * 7^3, x^4-252]
      521: [-54000 = - 2^4 * 3^3 * 5^3, x^4-30*x^2-15]
      814: [-84672 = - 2^6 * 3^3 * 7^2, x^4-42*x^2-147]
      820: [-85184 = - 2^6 * 11^3, x^4-44]
     1216: [-126144 = - 2^6 * 3^3 * 73, x^4-18*x^2-219]
     1217: [-126144 = - 2^6 * 3^3 * 73, x^4+18*x^2-219]
     1324: [-137200 = - 2^4 * 5^2 * 7^3, x^4-700]
     1923: [-194672 = - 2^4 * 23^3, x^4-92]
     2041: [-209088 = - 2^6 * 3^3 * 11^2, x^4-66*x^2-363]
     4634: [-476656 = - 2^4 * 31^3, x^4-124]
     4860: [-499392 = - 2^6 * 3^3 * 17^2, x^4-102*x^2-867]
     6072: [-623808 = - 2^6 * 3^3 * 19^2, x^4-114*x^2-1083]
     6460: [-664048 = - 2^4 * 7^3 * 11^2, x^4-3388]
     8958: [-914112 = - 2^6 * 3^3 * 23^2, x^4-138*x^2-1587]
     9090: [-927472 = - 2^4 * 7^3 * 13^2, x^4-4732]