rb_big2str       677 bignum.c           return rb_big2str(x, base);
rb_big2str       1126 numeric.c      	return rb_big2str(rb_int2big(FIX2INT(x)), 2);
rb_big2str       418 sprintf.c      		    val = rb_big2str(val, base);
rb_big2str       439 sprintf.c      		val = rb_big2str(val, base);