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How to use this for generating Graph500-like data

After building against any GraphBLAS library, the following will produce an edge list of scale 31 working in chunks of 2²⁸ edges (assuming bash):

./GrB-mxm-timer -f spgemm-31.bin --dump --binary --verbose=1000 -s 31 --NE-chunk-size=$((2**28))

The file format is relatively trivial and includes byte-order information. See io.c for details.

Note that this only generates the edge list. The GraphBLAS library into which this is fed will use its own internal format.