- n=100-300k, 23k left (4, 9, 113, 234, 443, 452, 467, 718, 807, 841, 872, 905, 919, 977, 1143, 1310, 1621, 1758, 1992, 2146, 2159, 2174, 2179)
- runtime 8min-1h24min (AVX@3.8Ghz)

1719*438^25173-1 found by Mumps [MM]
1269*438^25800-1 found by Ralfy
123*438^26062-1 found by [AT-Sollenau] Thomas Turk
1934*438^26517-1 found by Mumps [MM]
2193*438^29616-1 found by Ralfy
1674*438^30323-1 found by Mumps [MM]
1600*438^30469-1 found by [AT-Sollenau] Thomas Turk
823*438^35172-1 found by Ralfy
159*438^36140-1 found by Mumps [MM]
543*438^42061-1 found by Pete Broad
1647*438^44328-1 found by Mumps [MM]
2012*438^54439-1 found by Mumps [MM]
211*438^73142-1 found by Ralfy
2029*438^88660-1 found by Mumps [MM]
1458*438^95702-1 found by AQUA-MAN
1279*438^130519-1 found by Science United
1279*438^184615-1 found by m0laki
1341*438^185017-1 found by m0laki
1716*438^238775-1 found by Sightus@CAU
393*438^270533-1 found by Ralfy
963*438^272854-1 found by Ralfy