Prime Number Magazine, an imprint of Press 53, operates on a quadrimester cycle, with reading periods confined to the first two months of each four-month term. For Issue 307, scheduled for January–April 2027, the guest short fiction editor is Gerry Wilson, author of Crosscurrents and Other Stories. The reading window opens September 1 and closes October 31, 2026, at midnight Eastern time, or upon receipt of 199 submissions, whichever occurs first. There is no reading fee. The magazine’s rotating guest editor model ensures that each issue is shaped by a distinct editorial sensibility. Wilson’s own fiction—grounded, character-driven, and attentive to the pressures of place and memory—suggests a receptivity to stories that prioritize emotional precision and formal control. Writers are not submitting to an anonymous editorial board but to a specific practitioner whose tastes and craft commitments will inform the selection. This call offers publication in a established magazine with a demonstrated commitment to literary fiction. The absence of a reading fee and the capped submission window reflect a respect for both writers’ time and the editorial process. The guest editor’s background indicates a curatorial vision centered on narrative depth and the nuanced interplay of character and setting.